--- /dev/null
+/*
+ * linux/arch/m68k/coldfire/config.c
+ *
+ * Kurt Mahan kmahan@freescale.com
+ * Matt Waddel Matt.Waddel@freescale.com
+ * Copyright Freescale Semiconductor, Inc. 2007, 2008
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/bootmem.h>
+#include <linux/mm.h>
+#include <asm/bootinfo.h>
+#include <asm/machdep.h>
+#include <asm/coldfire.h>
+//#include <asm/cfcache.h>
+#include <asm/cacheflush.h>
+#include <asm/io.h>
+//#include <asm/cfmmu.h>
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/movs.h>
+#include <asm/movs.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+
+#include <asm/mcfsim.h>
+
+#ifdef CONFIG_UBOOT
+
+#if defined(CONFIG_M5445X)
+#define UBOOT_EXTRA_CLOCKS
+#elif defined(CONFIG_M547X_8X)
+#define UBOOT_PCI
+#endif
+
+#endif
+
+#include <asm/bootinfo.h>
+
+#ifdef CONFIG_M5445X
+#include <asm/mcf5445x_intc.h>
+#include <asm/mcf5445x_sdramc.h>
+#include <asm/mcf5445x_fbcs.h>
+#include <asm/mcf5445x_dtim.h>
+#include <asm/mcf5445x_xbs.h>
+#endif
+
+#ifdef CONFIG_M547X_8X
+#include <asm/m5485gpt.h>
+#endif
+
+extern int get_irq_list(struct seq_file *p, void *v);
+extern char _text, _end;
+extern char _etext, _edata, __init_begin, __init_end;
+extern struct console mcfrs_console;
+extern char m68k_command_line[CL_SIZE];
+extern unsigned long availmem;
+
+static int irq_enable[NR_IRQS];
+unsigned long num_pages;
+
+/* ethernet mac addresses from uboot */
+#ifdef CONFIG_UBOOT
+unsigned char uboot_enet0[6];
+unsigned char uboot_enet1[6];
+#endif
+
+void coldfire_sort_memrec(void)
+{
+ int i, j;
+
+ /* Sort the m68k_memory records by address */
+ for (i = 0; i < m68k_num_memory; ++i) {
+ for (j = i + 1; j < m68k_num_memory; ++j) {
+ if (m68k_memory[i].addr > m68k_memory[j].addr) {
+ struct mem_info tmp;
+ tmp = m68k_memory[i];
+ m68k_memory[i] = m68k_memory[j];
+ m68k_memory[j] = tmp;
+ }
+ }
+ }
+ /* Trim off discontiguous bits */
+ for (i = 1; i < m68k_num_memory; ++i) {
+ if ((m68k_memory[i-1].addr + m68k_memory[i-1].size) !=
+ m68k_memory[i].addr) {
+ printk(KERN_DEBUG "m68k_parse_bootinfo: addr gap between \
+ 0x%lx & 0x%lx\n",
+ m68k_memory[i-1].addr+m68k_memory[i-1].size,
+ m68k_memory[i].addr);
+ m68k_num_memory = i;
+ break;
+ }
+ }
+}
+
+/*
+ * UBoot Handler
+ */
+ #ifdef CONFIG_UBOOT
+int __init uboot_commandline(char *bootargs)
+{
+ int len = 0, cmd_line_len;
+ static struct uboot_record uboot_info;
+ u32 offset = PAGE_OFFSET_RAW - PHYS_OFFSET;
+
+ extern unsigned long uboot_info_stk;
+
+ /* validate address */
+ if ((uboot_info_stk < PAGE_OFFSET_RAW) ||
+ (uboot_info_stk >= (PAGE_OFFSET_RAW + CONFIG_SDRAM_SIZE)))
+ return 0;
+
+ /* Add offset to get post-remapped kernel memory location */
+ uboot_info.bdi = (struct bd_info *)((*(u32 *)(uboot_info_stk)) + offset);
+ uboot_info.initrd_start = (*(u32 *)(uboot_info_stk+4)) + offset;
+ uboot_info.initrd_end = (*(u32 *)(uboot_info_stk+8)) + offset;
+ uboot_info.cmd_line_start = (*(u32 *)(uboot_info_stk+12)) + offset;
+ uboot_info.cmd_line_stop = (*(u32 *)(uboot_info_stk+16)) + offset;
+
+ /* copy over mac addresses */
+ memcpy(uboot_enet0, uboot_info.bdi->bi_enet0addr, 6);
+ memcpy(uboot_enet1, uboot_info.bdi->bi_enet1addr, 6);
+
+ /* copy command line */
+ cmd_line_len = uboot_info.cmd_line_stop - uboot_info.cmd_line_start;
+ if ((cmd_line_len > 0) && (cmd_line_len < CL_SIZE-1))
+ len = (int)strncpy(bootargs, (char *)uboot_info.cmd_line_start,\
+ cmd_line_len);
+
+ return len;
+}
+#endif
+
+/*
+ * This routine does things not done in the bootloader.
+ */
+
+// Default command line is required to be passed from defconfig.
+
+asmlinkage void __init cf_early_init(void)
+{
+ struct bi_record *record = (struct bi_record *) &_end;
+
+ extern char _end;
+
+#if defined(CONFIG_M5445X)
+ SET_VBR((void *)MCF_RAMBAR1);
+#elif defined(CONFIG_M547X_8X)
+ SET_VBR((void *)MCF_RAMBAR0);
+#endif
+
+ /* Mask all interrupts */
+#if defined(CONFIG_M5445X)
+ MCF_INTC0_IMRL = 0xFFFFFFFF;
+ MCF_INTC0_IMRH = 0xFFFFFFFF;
+ MCF_INTC1_IMRL = 0xFFFFFFFF;
+ MCF_INTC1_IMRH = 0xFFFFFFFF;
+#elif defined(CONFIG_M547X_8X)
+ MCF_IMRL = 0xFFFFFFFF;
+ MCF_IMRH = 0xFFFFFFFF;
+#endif
+
+#if defined(CONFIG_M5445X)
+#if defined(CONFIG_NOR_FLASH_BASE)
+ MCF_FBCS_CSAR(1) = CONFIG_NOR_FLASH_BASE;
+#else
+ MCF_FBCS_CSAR(1) = 0x00000000;
+#endif
+
+#if CONFIG_SDRAM_SIZE > (256*1024*1024)
+ /* Init optional SDRAM chip select */
+ MCF_SDRAMC_SDCS(1) = (256*1024*1024) | 0x1B;
+#endif
+#endif /* CONFIG_M5445X */
+
+#if defined(CONFIG_M5445X)
+ /* Setup SDRAM crossbar(XBS) priorities */
+ MCF_XBS_PRS2 = (MCF_XBS_PRS_M0(MCF_XBS_PRI_2) |
+ MCF_XBS_PRS_M1(MCF_XBS_PRI_3) |
+ MCF_XBS_PRS_M2(MCF_XBS_PRI_4) |
+ MCF_XBS_PRS_M3(MCF_XBS_PRI_5) |
+ MCF_XBS_PRS_M5(MCF_XBS_PRI_6) |
+ MCF_XBS_PRS_M6(MCF_XBS_PRI_1) |
+ MCF_XBS_PRS_M7(MCF_XBS_PRI_7));
+#endif
+
+ m68k_machtype = MACH_CFMMU;
+ m68k_fputype = FPU_CFV4E;
+ m68k_mmutype = MMU_CFV4E;
+ m68k_cputype = CPU_CFV4E;
+
+ m68k_num_memory = 0;
+ m68k_memory[m68k_num_memory].addr = CONFIG_SDRAM_BASE;
+ m68k_memory[m68k_num_memory++].size = CONFIG_SDRAM_SIZE;
+
+
+#ifdef CONFIG_UBOOT
+ if (!uboot_commandline(m68k_command_line))
+ strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE-1);
+#else
+ //FIXME: some better way here
+ strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE-1);
+#endif
+
+#if defined(CONFIG_BLK_DEV_INITRD)
+ /* add initrd image */
+ record = (struct bi_record *) ((void *)record + record->size);
+ record->tag = BI_RAMDISK;
+ record->size = sizeof(record->tag) + sizeof(record->size)
+ + sizeof(record->data[0]) + sizeof(record->data[1]);
+#endif
+
+ /* Mark end of tags. */
+ record = (struct bi_record *) ((void *) record + record->size);
+ record->tag = 0;
+ record->data[0] = 0;
+ record->data[1] = 0;
+ record->size = sizeof(record->tag) + sizeof(record->size)
+ + sizeof(record->data[0]) + sizeof(record->data[1]);
+
+ /* Invalidate caches via CACR */
+ flush_bcache();
+ cacr_set(CACHE_DISABLE_MODE);
+
+ /* Turn on caches via CACR, enable EUSP */
+ cacr_set(CACHE_INITIAL_MODE);
+
+}
+
+#if defined(CONFIG_M5445X)
+void settimericr(unsigned int timer, unsigned int level)
+{
+ volatile unsigned char *icrp;
+ unsigned int icr;
+ unsigned char irq;
+
+ if (timer <= 2) {
+ switch (timer) {
+ case 2: irq = 33; icr = MCFSIM_ICR_TIMER2; break;
+ default: irq = 32; icr = MCFSIM_ICR_TIMER1; break;
+ }
+
+ icrp = (volatile unsigned char *) (icr);
+ *icrp = level;
+ coldfire_enable_irq0(irq);
+ }
+}
+#endif
+
+/* Assembler routines */
+asmlinkage void buserr(void);
+asmlinkage void trap(void);
+asmlinkage void system_call(void);
+asmlinkage void inthandler(void);
+
+void __init coldfire_trap_init(void)
+{
+ int i = 0;
+ e_vector *vectors;
+
+#if defined(CONFIG_M5445X)
+ vectors = (e_vector *)MCF_RAMBAR1;
+#elif defined(CONFIG_M547X_8X)
+ vectors = (e_vector *)MCF_RAMBAR0;
+#endif
+ /*
+ * There is a common trap handler and common interrupt
+ * handler that handle almost every vector. We treat
+ * the system call and bus error special, they get their
+ * own first level handlers.
+ */
+ for (i = 3; (i <= 23); i++)
+ vectors[i] = trap;
+ for (i = 33; (i <= 63); i++)
+ vectors[i] = trap;
+ for (i = 24; (i <= 31); i++)
+ vectors[i] = inthandler;
+ for (i = 64; (i < 255); i++)
+ vectors[i] = inthandler;
+
+ vectors[255] = 0;
+ vectors[2] = buserr;
+ vectors[32] = system_call;
+}
+
+#if defined(CONFIG_M5445X)
+
+void coldfire_tick(void)
+{
+ /* Reset the ColdFire timer */
+ __raw_writeb(MCF_DTIM_DTER_CAP | MCF_DTIM_DTER_REF, MCF_DTIM0_DTER);
+}
+
+void __init coldfire_sched_init(irq_handler_t handler)
+{
+ unsigned int mcf_timerlevel = 5;
+ unsigned int mcf_timervector = 64+32;
+
+ __raw_writew(MCF_DTIM_DTMR_RST_RST, MCF_DTIM0_DTMR);
+ __raw_writel(((MCF_BUSCLK / 16) / HZ), MCF_DTIM0_DTRR);
+ __raw_writew(MCF_DTIM_DTMR_ORRI | MCF_DTIM_DTMR_CLK_DIV16 |
+ MCF_DTIM_DTMR_FRR | MCF_DTIM_DTMR_RST_EN, \
+ MCF_DTIM0_DTMR);
+
+ request_irq(mcf_timervector, handler, IRQF_DISABLED, \
+ "timer", (void *)MCF_DTIM0_DTMR);
+
+ settimericr(1, mcf_timerlevel);
+}
+
+int timerirqpending(int timer)
+{
+ unsigned int imr = 0;
+
+ switch (timer) {
+ case 1: imr = 0x1; break;
+ case 2: imr = 0x2; break;
+ default: break;
+ }
+
+ return (getiprh() & imr);
+}
+
+unsigned long coldfire_gettimeoffset(void)
+{
+ volatile unsigned long trr, tcn, offset;
+
+ tcn = __raw_readw(MCF_DTIM0_DTCN);
+ trr = __raw_readl(MCF_DTIM0_DTRR);
+ offset = (tcn * (1000000 / HZ)) / trr;
+
+ /* Check if we just wrapped the counters and maybe missed a tick */
+ if ((offset < (1000000 / HZ / 2)) && timerirqpending(1))
+ offset += 1000000 / HZ;
+ return offset;
+}
+
+#elif defined(CONFIG_M547X_8X)
+
+void coldfire_tick(void)
+{
+ /* Reset the ColdFire timer */
+ MCF_SSR(0) = MCF_SSR_ST;
+}
+
+void __init coldfire_sched_init(irq_handler_t handler)
+{
+ int irq = ISC_SLTn(0);
+
+ MCF_SCR(0) = 0;
+ MCF_ICR(irq) = ILP_SLT0;
+ request_irq(64 + irq, handler, IRQF_DISABLED, "ColdFire Timer 0", NULL);
+ MCF_SLTCNT(0) = MCF_BUSCLK / HZ;
+ MCF_SCR(0) |= MCF_SCR_TEN | MCF_SCR_IEN | MCF_SCR_RUN;
+}
+
+unsigned long coldfire_gettimeoffset(void)
+{
+ volatile unsigned long trr, tcn, offset;
+ trr = MCF_SLTCNT(0);
+ tcn = MCF_SCNT(0);
+
+ offset = (trr - tcn) * ((1000000 >> 3) / HZ) / (trr >> 3);
+ if (MCF_SSR(0) & MCF_SSR_ST)
+ offset += 1000000 / HZ;
+
+ return offset;
+}
+
+#endif
+
+void coldfire_reboot(void)
+{
+#if defined(CONFIG_M5445X)
+ /* disable interrupts and do a software reset */
+ asm("movew #0x2700, %%sr\n\t"
+ "moveb #0x80, %%d0\n\t"
+ "moveb %%d0, 0xfc0a0000\n\t"
+ : : : "%d0");
+#elif defined(CONFIG_M547X_8X)
+ /* disable interrupts and enable the watchdog */
+ printk(KERN_INFO "Rebooting\n");
+ asm("movew #0x2700, %sr\n");
+ MCF_GPT_GMS0 = MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4);
+#endif
+}
+
+static void coldfire_get_model(char *model)
+{
+ sprintf(model, "Version 4 ColdFire");
+}
+
+static void __init
+coldfire_bootmem_alloc(unsigned long memory_start, unsigned long memory_end)
+{
+ unsigned long base_pfn;
+
+ /* compute total pages in system */
+ num_pages = PAGE_ALIGN(memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
+
+ /* align start/end to page boundries */
+ memory_start = PAGE_ALIGN(memory_start);
+ memory_end = memory_end & PAGE_MASK;
+
+ /* page numbers */
+ base_pfn = __pa(PAGE_OFFSET) >> PAGE_SHIFT;
+ min_low_pfn = __pa(memory_start) >> PAGE_SHIFT;
+ max_low_pfn = __pa(memory_end) >> PAGE_SHIFT;
+
+ high_memory = (void *)memory_end;
+ availmem = memory_start;
+
+ /* setup bootmem data */
+ m68k_setup_node(0);
+ availmem += init_bootmem_node(NODE_DATA(0), min_low_pfn,
+ base_pfn, max_low_pfn);
+ availmem = PAGE_ALIGN(availmem);
+ free_bootmem(__pa(availmem), memory_end - (availmem));
+}
+
+void __init config_coldfire(void)
+{
+ unsigned long endmem, startmem;
+ int i;
+
+ /*
+ * Calculate endmem from m68k_memory, assume all are contiguous
+ */
+ startmem = ((((int) &_end) + (PAGE_SIZE - 1)) & PAGE_MASK);
+ endmem = PAGE_OFFSET;
+ for (i = 0; i < m68k_num_memory; ++i)
+ endmem += m68k_memory[i].size;
+
+ printk(KERN_INFO "starting up linux startmem 0x%lx, endmem 0x%lx, \
+ size %luMB\n", startmem, endmem, (endmem - startmem) >> 20);
+
+ memset(irq_enable, 0, sizeof(irq_enable));
+
+ /*
+ * Setup coldfire mach-specific handlers
+ */
+ mach_max_dma_address = 0xffffffff;
+ mach_sched_init = coldfire_sched_init;
+ mach_tick = coldfire_tick;
+ mach_gettimeoffset = coldfire_gettimeoffset;
+ mach_reset = coldfire_reboot;
+/* mach_hwclk = coldfire_hwclk; to be done */
+ mach_get_model = coldfire_get_model;
+
+ coldfire_bootmem_alloc(startmem, endmem-1);
+
+ /*
+ * initrd setup
+ */
+/* #ifdef CONFIG_BLK_DEV_INITRD
+ if (m68k_ramdisk.size) {
+ reserve_bootmem (__pa(m68k_ramdisk.addr), m68k_ramdisk.size);
+ initrd_start = (unsigned long) m68k_ramdisk.addr;
+ initrd_end = initrd_start + m68k_ramdisk.size;
+ printk (KERN_DEBUG "initrd: %08lx - %08lx\n", initrd_start,
+ initrd_end);
+ }
+#endif */
+
+#if defined(CONFIG_DUMMY_CONSOLE) || defined(CONFIG_FRAMEBUFFER_CONSOLE)
+ conswitchp = &dummy_con;
+#endif
+
+}
--- /dev/null
+/* -*- mode: asm -*-
+ *
+ * linux/arch/m68k/kernel/entry.S
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file README.legal in the main directory of this archive
+ * for more details.
+ *
+ * Linux/m68k support by Hamish Macdonald
+ *
+ * 68060 fixes by Jesper Skov
+ *
+ */
+
+/*
+ * entry.S contains the system-call and fault low-level handling routines.
+ * This also contains the timer-interrupt handler, as well as all interrupts
+ * and faults that can result in a task-switch.
+ *
+ * NOTE: This code handles signal-recognition, which happens every time
+ * after a timer-interrupt and after each system call.
+ *
+ */
+
+/*
+ * 12/03/96 Jes: Currently we only support m68k single-cpu systems, so
+ * all pointers that used to be 'current' are now entry
+ * number 0 in the 'current_set' list.
+ *
+ * 6/05/00 RZ: addedd writeback completion after return from sighandler
+ * for 68040
+ */
+
+#include <linux/linkage.h>
+#include <asm/entry.h>
+#include <asm/errno.h>
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/traps.h>
+#include <asm/unistd.h>
+
+#include <asm/asm-offsets.h>
+
+.globl system_call, buserr, trap, resume
+.globl sys_call_table
+.globl sys_fork, sys_clone, sys_vfork
+.globl ret_from_interrupt, bad_interrupt
+.globl auto_irqhandler_fixup
+.globl user_irqvec_fixup, user_irqhandler_fixup
+
+.text
+ENTRY(buserr)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ movel %sp,%sp@- | stack frame pointer argument
+ bsrl buserr_c
+ addql #4,%sp
+ jra .Lret_from_exception
+
+ENTRY(trap)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ movel %sp,%sp@- | stack frame pointer argument
+ bsrl trap_c
+ addql #4,%sp
+ jra .Lret_from_exception
+
+ | After a fork we jump here directly from resume,
+ | so that %d1 contains the previous task
+ | schedule_tail now used regardless of CONFIG_SMP
+ENTRY(ret_from_fork)
+ movel %d1,%sp@-
+ jsr schedule_tail
+ addql #4,%sp
+ jra .Lret_from_exception
+
+do_trace_entry:
+ movel #-ENOSYS,%sp@(PT_OFF_D0)| needed for strace
+ subql #4,%sp
+ SAVE_SWITCH_STACK
+ jbsr syscall_trace
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+ movel %sp@(PT_OFF_ORIG_D0),%d0
+ cmpl #NR_syscalls,%d0
+ jcs syscall
+badsys:
+ movel #-ENOSYS,%sp@(PT_OFF_D0)
+ jra ret_from_syscall
+
+do_trace_exit:
+ subql #4,%sp
+ SAVE_SWITCH_STACK
+ jbsr syscall_trace
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+ jra .Lret_from_exception
+
+ENTRY(ret_from_signal)
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+/* on 68040 complete pending writebacks if any */
+#ifdef CONFIG_M68040
+ bfextu %sp@(PT_OFF_FORMATVEC){#0,#4},%d0
+ subql #7,%d0 | bus error frame ?
+ jbne 1f
+ movel %sp,%sp@-
+ jbsr berr_040cleanup
+ addql #4,%sp
+1:
+#endif
+ jra .Lret_from_exception
+
+ENTRY(system_call)
+ SAVE_ALL_SYS
+
+ GET_CURRENT(%d1)
+ | save top of frame
+ movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0)
+
+ | syscall trace?
+ tstb %curptr@(TASK_INFO+TINFO_FLAGS+2)
+ jmi do_trace_entry
+ cmpl #NR_syscalls,%d0
+ jcc badsys
+syscall:
+ jbsr @(sys_call_table,%d0:l:4)@(0)
+ movel %d0,%sp@(PT_OFF_D0) | save the return value
+ret_from_syscall:
+ |oriw #0x0700,%sr
+ movew %curptr@(TASK_INFO+TINFO_FLAGS+2),%d0
+ jne syscall_exit_work
+1: RESTORE_ALL
+
+syscall_exit_work:
+ btst #5,%sp@(PT_OFF_SR) | check if returning to kernel
+ bnes 1b | if so, skip resched, signals
+ lslw #1,%d0
+ jcs do_trace_exit
+ jmi do_delayed_trace
+ lslw #8,%d0
+ jmi do_signal_return
+ pea resume_userspace
+ jra schedule
+
+
+ENTRY(ret_from_exception)
+.Lret_from_exception:
+ btst #5,%sp@(PT_OFF_SR) | check if returning to kernel
+ bnes 1f | if so, skip resched, signals
+ | only allow interrupts when we are really the last one on the
+ | kernel stack, otherwise stack overflow can occur during
+ | heavy interrupt load
+ andw #ALLOWINT,%sr
+
+resume_userspace:
+ moveb %curptr@(TASK_INFO+TINFO_FLAGS+3),%d0
+ jne exit_work
+1: RESTORE_ALL
+
+exit_work:
+ | save top of frame
+ movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0)
+ lslb #1,%d0
+ jmi do_signal_return
+ pea resume_userspace
+ jra schedule
+
+
+do_signal_return:
+ |andw #ALLOWINT,%sr
+ subql #4,%sp | dummy return address
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ clrl %sp@-
+ bsrl do_signal
+ addql #8,%sp
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+ tstl %d0
+ jeq resume_userspace
+ | when single stepping into handler stop at the first insn
+ btst #6,%curptr@(TASK_INFO+TINFO_FLAGS+2)
+ jeq resume_userspace
+
+do_delayed_trace:
+ bclr #7,%sp@(PT_OFF_SR) | clear trace bit in SR
+ pea 1 | send SIGTRAP
+ movel %curptr,%sp@-
+ pea LSIGTRAP
+ jbsr send_sig
+ addql #8,%sp
+ addql #4,%sp
+ jbra resume_userspace
+
+
+/* This is the main interrupt handler for autovector interrupts */
+
+ENTRY(auto_inthandler)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+ | put exception # in d0
+ bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0
+ subw #VEC_SPUR,%d0
+
+ movel %sp,%sp@-
+ movel %d0,%sp@- | put vector # on stack
+auto_irqhandler_fixup = . + 2
+ jsr __m68k_handle_int | process the IRQ
+ addql #8,%sp | pop parameters off stack
+
+ret_from_interrupt:
+ subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+ jeq ret_from_last_interrupt
+2: RESTORE_ALL
+
+ ALIGN
+ret_from_last_interrupt:
+ moveq #(~ALLOWINT>>8)&0xff,%d0
+ andb %sp@(PT_OFF_SR),%d0
+ jne 2b
+
+ /* check if we need to do software interrupts */
+ tstl irq_stat+CPUSTAT_SOFTIRQ_PENDING
+ jeq .Lret_from_exception
+ pea ret_from_exception
+ jra do_softirq
+
+/* Handler for user defined interrupt vectors */
+
+ENTRY(user_inthandler)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+ | put exception # in d0
+ bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0
+user_irqvec_fixup = . + 2
+ subw #VEC_USER,%d0
+
+ movel %sp,%sp@-
+ movel %d0,%sp@- | put vector # on stack
+user_irqhandler_fixup = . + 2
+ jsr __m68k_handle_int | process the IRQ
+ addql #8,%sp | pop parameters off stack
+
+ subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+ jeq ret_from_last_interrupt
+ RESTORE_ALL
+
+/* Handler for uninitialized and spurious interrupts */
+
+ENTRY(bad_inthandler)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ addqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+
+ movel %sp,%sp@-
+ jsr handle_badint
+ addql #4,%sp
+
+ subqb #1,%curptr@(TASK_INFO+TINFO_PREEMPT+1)
+ jeq ret_from_last_interrupt
+ RESTORE_ALL
+
+
+ENTRY(sys_fork)
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ jbsr m68k_fork
+ addql #4,%sp
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_clone)
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ jbsr m68k_clone
+ addql #4,%sp
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_vfork)
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ jbsr m68k_vfork
+ addql #4,%sp
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_sigsuspend)
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ jbsr do_sigsuspend
+ addql #4,%sp
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_rt_sigsuspend)
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ jbsr do_rt_sigsuspend
+ addql #4,%sp
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_sigreturn)
+ SAVE_SWITCH_STACK
+ jbsr do_sigreturn
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_rt_sigreturn)
+ SAVE_SWITCH_STACK
+ jbsr do_rt_sigreturn
+ RESTORE_SWITCH_STACK
+ rts
+
+resume:
+ /*
+ * Beware - when entering resume, prev (the current task) is
+ * in a0, next (the new task) is in a1,so don't change these
+ * registers until their contents are no longer needed.
+ */
+
+ /* save sr */
+ movew %sr,%a0@(TASK_THREAD+THREAD_SR)
+
+ /* save fs (sfc,%dfc) (may be pointing to kernel memory) */
+ movec %sfc,%d0
+ movew %d0,%a0@(TASK_THREAD+THREAD_FS)
+
+ /* save usp */
+ /* it is better to use a movel here instead of a movew 8*) */
+ movec %usp,%d0
+ movel %d0,%a0@(TASK_THREAD+THREAD_USP)
+
+ /* save non-scratch registers on stack */
+ SAVE_SWITCH_STACK
+
+ /* save current kernel stack pointer */
+ movel %sp,%a0@(TASK_THREAD+THREAD_KSP)
+
+ /* save floating point context */
+#ifndef CONFIG_M68KFPU_EMU_ONLY
+#ifdef CONFIG_M68KFPU_EMU
+ tstl m68k_fputype
+ jeq 3f
+#endif
+ fsave %a0@(TASK_THREAD+THREAD_FPSTATE)
+
+#if defined(CONFIG_M68060)
+#if !defined(CPU_M68060_ONLY)
+ btst #3,m68k_cputype+3
+ beqs 1f
+#endif
+ /* The 060 FPU keeps status in bits 15-8 of the first longword */
+ tstb %a0@(TASK_THREAD+THREAD_FPSTATE+2)
+ jeq 3f
+#if !defined(CPU_M68060_ONLY)
+ jra 2f
+#endif
+#endif /* CONFIG_M68060 */
+#if !defined(CPU_M68060_ONLY)
+1: tstb %a0@(TASK_THREAD+THREAD_FPSTATE)
+ jeq 3f
+#endif
+2: fmovemx %fp0-%fp7,%a0@(TASK_THREAD+THREAD_FPREG)
+ fmoveml %fpcr/%fpsr/%fpiar,%a0@(TASK_THREAD+THREAD_FPCNTL)
+3:
+#endif /* CONFIG_M68KFPU_EMU_ONLY */
+ /* Return previous task in %d1 */
+ movel %curptr,%d1
+
+ /* switch to new task (a1 contains new task) */
+ movel %a1,%curptr
+
+ /* restore floating point context */
+#ifndef CONFIG_M68KFPU_EMU_ONLY
+#ifdef CONFIG_M68KFPU_EMU
+ tstl m68k_fputype
+ jeq 4f
+#endif
+#if defined(CONFIG_M68060)
+#if !defined(CPU_M68060_ONLY)
+ btst #3,m68k_cputype+3
+ beqs 1f
+#endif
+ /* The 060 FPU keeps status in bits 15-8 of the first longword */
+ tstb %a1@(TASK_THREAD+THREAD_FPSTATE+2)
+ jeq 3f
+#if !defined(CPU_M68060_ONLY)
+ jra 2f
+#endif
+#endif /* CONFIG_M68060 */
+#if !defined(CPU_M68060_ONLY)
+1: tstb %a1@(TASK_THREAD+THREAD_FPSTATE)
+ jeq 3f
+#endif
+2: fmovemx %a1@(TASK_THREAD+THREAD_FPREG),%fp0-%fp7
+ fmoveml %a1@(TASK_THREAD+THREAD_FPCNTL),%fpcr/%fpsr/%fpiar
+3: frestore %a1@(TASK_THREAD+THREAD_FPSTATE)
+4:
+#endif /* CONFIG_M68KFPU_EMU_ONLY */
+
+ /* restore the kernel stack pointer */
+ movel %a1@(TASK_THREAD+THREAD_KSP),%sp
+
+ /* restore non-scratch registers */
+ RESTORE_SWITCH_STACK
+
+ /* restore user stack pointer */
+ movel %a1@(TASK_THREAD+THREAD_USP),%a0
+ movel %a0,%usp
+
+ /* restore fs (sfc,%dfc) */
+ movew %a1@(TASK_THREAD+THREAD_FS),%a0
+ movec %a0,%sfc
+ movec %a0,%dfc
+
+ /* restore status register */
+ movew %a1@(TASK_THREAD+THREAD_SR),%sr
+
+ rts
+
+.data
+ALIGN
+sys_call_table:
+ .long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */
+ .long sys_exit
+ .long sys_fork
+ .long sys_read
+ .long sys_write
+ .long sys_open /* 5 */
+ .long sys_close
+ .long sys_waitpid
+ .long sys_creat
+ .long sys_link
+ .long sys_unlink /* 10 */
+ .long sys_execve
+ .long sys_chdir
+ .long sys_time
+ .long sys_mknod
+ .long sys_chmod /* 15 */
+ .long sys_chown16
+ .long sys_ni_syscall /* old break syscall holder */
+ .long sys_stat
+ .long sys_lseek
+ .long sys_getpid /* 20 */
+ .long sys_mount
+ .long sys_oldumount
+ .long sys_setuid16
+ .long sys_getuid16
+ .long sys_stime /* 25 */
+ .long sys_ptrace
+ .long sys_alarm
+ .long sys_fstat
+ .long sys_pause
+ .long sys_utime /* 30 */
+ .long sys_ni_syscall /* old stty syscall holder */
+ .long sys_ni_syscall /* old gtty syscall holder */
+ .long sys_access
+ .long sys_nice
+ .long sys_ni_syscall /* 35 */ /* old ftime syscall holder */
+ .long sys_sync
+ .long sys_kill
+ .long sys_rename
+ .long sys_mkdir
+ .long sys_rmdir /* 40 */
+ .long sys_dup
+ .long sys_pipe
+ .long sys_times
+ .long sys_ni_syscall /* old prof syscall holder */
+ .long sys_brk /* 45 */
+ .long sys_setgid16
+ .long sys_getgid16
+ .long sys_signal
+ .long sys_geteuid16
+ .long sys_getegid16 /* 50 */
+ .long sys_acct
+ .long sys_umount /* recycled never used phys() */
+ .long sys_ni_syscall /* old lock syscall holder */
+ .long sys_ioctl
+ .long sys_fcntl /* 55 */
+ .long sys_ni_syscall /* old mpx syscall holder */
+ .long sys_setpgid
+ .long sys_ni_syscall /* old ulimit syscall holder */
+ .long sys_ni_syscall
+ .long sys_umask /* 60 */
+ .long sys_chroot
+ .long sys_ustat
+ .long sys_dup2
+ .long sys_getppid
+ .long sys_getpgrp /* 65 */
+ .long sys_setsid
+ .long sys_sigaction
+ .long sys_sgetmask
+ .long sys_ssetmask
+ .long sys_setreuid16 /* 70 */
+ .long sys_setregid16
+ .long sys_sigsuspend
+ .long sys_sigpending
+ .long sys_sethostname
+ .long sys_setrlimit /* 75 */
+ .long sys_old_getrlimit
+ .long sys_getrusage
+ .long sys_gettimeofday
+ .long sys_settimeofday
+ .long sys_getgroups16 /* 80 */
+ .long sys_setgroups16
+ .long sys_old_select
+ .long sys_symlink
+ .long sys_lstat
+ .long sys_readlink /* 85 */
+ .long sys_uselib
+ .long sys_swapon
+ .long sys_reboot
+ .long sys_old_readdir
+ .long sys_old_mmap /* 90 */
+ .long sys_munmap
+ .long sys_truncate
+ .long sys_ftruncate
+ .long sys_fchmod
+ .long sys_fchown16 /* 95 */
+ .long sys_getpriority
+ .long sys_setpriority
+ .long sys_ni_syscall /* old profil syscall holder */
+ .long sys_statfs
+ .long sys_fstatfs /* 100 */
+ .long sys_ni_syscall /* ioperm for i386 */
+ .long sys_socketcall
+ .long sys_syslog
+ .long sys_setitimer
+ .long sys_getitimer /* 105 */
+ .long sys_newstat
+ .long sys_newlstat
+ .long sys_newfstat
+ .long sys_ni_syscall
+ .long sys_ni_syscall /* 110 */ /* iopl for i386 */
+ .long sys_vhangup
+ .long sys_ni_syscall /* obsolete idle() syscall */
+ .long sys_ni_syscall /* vm86old for i386 */
+ .long sys_wait4
+ .long sys_swapoff /* 115 */
+ .long sys_sysinfo
+ .long sys_ipc
+ .long sys_fsync
+ .long sys_sigreturn
+ .long sys_clone /* 120 */
+ .long sys_setdomainname
+ .long sys_newuname
+ .long sys_cacheflush /* modify_ldt for i386 */
+ .long sys_adjtimex
+ .long sys_mprotect /* 125 */
+ .long sys_sigprocmask
+ .long sys_ni_syscall /* old "create_module" */
+ .long sys_init_module
+ .long sys_delete_module
+ .long sys_ni_syscall /* 130 - old "get_kernel_syms" */
+ .long sys_quotactl
+ .long sys_getpgid
+ .long sys_fchdir
+ .long sys_bdflush
+ .long sys_sysfs /* 135 */
+ .long sys_personality
+ .long sys_ni_syscall /* for afs_syscall */
+ .long sys_setfsuid16
+ .long sys_setfsgid16
+ .long sys_llseek /* 140 */
+ .long sys_getdents
+ .long sys_select
+ .long sys_flock
+ .long sys_msync
+ .long sys_readv /* 145 */
+ .long sys_writev
+ .long sys_getsid
+ .long sys_fdatasync
+ .long sys_sysctl
+ .long sys_mlock /* 150 */
+ .long sys_munlock
+ .long sys_mlockall
+ .long sys_munlockall
+ .long sys_sched_setparam
+ .long sys_sched_getparam /* 155 */
+ .long sys_sched_setscheduler
+ .long sys_sched_getscheduler
+ .long sys_sched_yield
+ .long sys_sched_get_priority_max
+ .long sys_sched_get_priority_min /* 160 */
+ .long sys_sched_rr_get_interval
+ .long sys_nanosleep
+ .long sys_mremap
+ .long sys_setresuid16
+ .long sys_getresuid16 /* 165 */
+ .long sys_getpagesize
+ .long sys_ni_syscall /* old sys_query_module */
+ .long sys_poll
+ .long sys_nfsservctl
+ .long sys_setresgid16 /* 170 */
+ .long sys_getresgid16
+ .long sys_prctl
+ .long sys_rt_sigreturn
+ .long sys_rt_sigaction
+ .long sys_rt_sigprocmask /* 175 */
+ .long sys_rt_sigpending
+ .long sys_rt_sigtimedwait
+ .long sys_rt_sigqueueinfo
+ .long sys_rt_sigsuspend
+ .long sys_pread64 /* 180 */
+ .long sys_pwrite64
+ .long sys_lchown16;
+ .long sys_getcwd
+ .long sys_capget
+ .long sys_capset /* 185 */
+ .long sys_sigaltstack
+ .long sys_sendfile
+ .long sys_ni_syscall /* streams1 */
+ .long sys_ni_syscall /* streams2 */
+ .long sys_vfork /* 190 */
+ .long sys_getrlimit
+ .long sys_mmap2
+ .long sys_truncate64
+ .long sys_ftruncate64
+ .long sys_stat64 /* 195 */
+ .long sys_lstat64
+ .long sys_fstat64
+ .long sys_chown
+ .long sys_getuid
+ .long sys_getgid /* 200 */
+ .long sys_geteuid
+ .long sys_getegid
+ .long sys_setreuid
+ .long sys_setregid
+ .long sys_getgroups /* 205 */
+ .long sys_setgroups
+ .long sys_fchown
+ .long sys_setresuid
+ .long sys_getresuid
+ .long sys_setresgid /* 210 */
+ .long sys_getresgid
+ .long sys_lchown
+ .long sys_setuid
+ .long sys_setgid
+ .long sys_setfsuid /* 215 */
+ .long sys_setfsgid
+ .long sys_pivot_root
+ .long sys_ni_syscall
+ .long sys_ni_syscall
+ .long sys_getdents64 /* 220 */
+ .long sys_gettid
+ .long sys_tkill
+ .long sys_setxattr
+ .long sys_lsetxattr
+ .long sys_fsetxattr /* 225 */
+ .long sys_getxattr
+ .long sys_lgetxattr
+ .long sys_fgetxattr
+ .long sys_listxattr
+ .long sys_llistxattr /* 230 */
+ .long sys_flistxattr
+ .long sys_removexattr
+ .long sys_lremovexattr
+ .long sys_fremovexattr
+ .long sys_futex /* 235 */
+ .long sys_sendfile64
+ .long sys_mincore
+ .long sys_madvise
+ .long sys_fcntl64
+ .long sys_readahead /* 240 */
+ .long sys_io_setup
+ .long sys_io_destroy
+ .long sys_io_getevents
+ .long sys_io_submit
+ .long sys_io_cancel /* 245 */
+ .long sys_fadvise64
+ .long sys_exit_group
+ .long sys_lookup_dcookie
+ .long sys_epoll_create
+ .long sys_epoll_ctl /* 250 */
+ .long sys_epoll_wait
+ .long sys_remap_file_pages
+ .long sys_set_tid_address
+ .long sys_timer_create
+ .long sys_timer_settime /* 255 */
+ .long sys_timer_gettime
+ .long sys_timer_getoverrun
+ .long sys_timer_delete
+ .long sys_clock_settime
+ .long sys_clock_gettime /* 260 */
+ .long sys_clock_getres
+ .long sys_clock_nanosleep
+ .long sys_statfs64
+ .long sys_fstatfs64
+ .long sys_tgkill /* 265 */
+ .long sys_utimes
+ .long sys_fadvise64_64
+ .long sys_mbind
+ .long sys_get_mempolicy
+ .long sys_set_mempolicy /* 270 */
+ .long sys_mq_open
+ .long sys_mq_unlink
+ .long sys_mq_timedsend
+ .long sys_mq_timedreceive
+ .long sys_mq_notify /* 275 */
+ .long sys_mq_getsetattr
+ .long sys_waitid
+ .long sys_ni_syscall /* for sys_vserver */
+ .long sys_add_key
+ .long sys_request_key /* 280 */
+ .long sys_keyctl
+ .long sys_ioprio_set
+ .long sys_ioprio_get
+ .long sys_inotify_init
+ .long sys_inotify_add_watch /* 285 */
+ .long sys_inotify_rm_watch
+ .long sys_migrate_pages
+ .long sys_openat
+ .long sys_mkdirat
+ .long sys_mknodat /* 290 */
+ .long sys_fchownat
+ .long sys_futimesat
+ .long sys_fstatat64
+ .long sys_unlinkat
+ .long sys_renameat /* 295 */
+ .long sys_linkat
+ .long sys_symlinkat
+ .long sys_readlinkat
+ .long sys_fchmodat
+ .long sys_faccessat /* 300 */
+ .long sys_ni_syscall /* Reserved for pselect6 */
+ .long sys_ni_syscall /* Reserved for ppoll */
+ .long sys_unshare
+ .long sys_set_robust_list
+ .long sys_get_robust_list /* 305 */
+ .long sys_splice
+ .long sys_sync_file_range
+ .long sys_tee
+ .long sys_vmsplice
+ .long sys_move_pages /* 310 */
+ .long sys_sched_setaffinity
+ .long sys_sched_getaffinity
+ .long sys_kexec_load
+ .long sys_getcpu
+ .long sys_epoll_pwait /* 315 */
+ .long sys_utimensat
+ .long sys_signalfd
+ .long sys_timerfd_create
+ .long sys_eventfd
+ .long sys_fallocate /* 320 */
+ .long sys_timerfd_settime
+ .long sys_timerfd_gettime
+ .long sys_signalfd4
+ .long sys_eventfd2
+ .long sys_epoll_create1 /* 325 */
+ .long sys_dup3
+ .long sys_pipe2
+ .long sys_inotify_init1
+ .long sys_preadv
+ .long sys_pwritev /* 330 */
+ .long sys_rt_tgsigqueueinfo
+ .long sys_perf_event_open
+ .long sys_get_thread_area
+ .long sys_set_thread_area
+ .long sys_atomic_cmpxchg_32 /* 335 */
+ .long sys_atomic_barrier
+ .long sys_fanotify_init
+ .long sys_fanotify_mark
+ .long sys_prlimit64
+
--- /dev/null
+/*
+ * head.S is the MMU enabled ColdFire specific initial boot code
+ *
+ * Ported to ColdFire by
+ * Matt Waddel Matt.Waddel@freescale.com
+ * Kurt Mahan kmahan@freescale.com
+ * Copyright Freescale Semiconductor, Inc. 2007, 2008
+ * Phys kernel mapping Copyright Daniel Krueger, SYSTEC electornic GmbH 2008
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Parts of this code came from arch/m68k/kernel/head.S
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/bootinfo.h>
+#include <asm/setup.h>
+#include <asm/entry.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/coldfire.h>
+#include <asm/mcfuart.h>
+#include <asm/mcfcache.h>
+#include <asm/thread_info.h>
+
+#define DEBUG
+
+.globl kernel_pg_dir
+.globl availmem
+.globl set_context
+.globl set_fpga
+#if defined(CONFIG_UBOOT)
+.global uboot_init_sp
+#endif
+
+
+#ifdef DEBUG
+/* When debugging use readable names for labels */
+#ifdef __STDC__
+#define L(name) .head.S.##name
+#else
+#define L(name) .head.S./**/name
+#endif
+#else
+#ifdef __STDC__
+#define L(name) .L##name
+#else
+#define L(name) .L/**/name
+#endif
+#endif
+
+/* The __INITDATA stuff is a no-op when ftrace or kgdb are turned on */
+#ifndef __INITDATA
+#define __INITDATA .data
+#define __FINIT .previous
+#endif
+
+#if CONFIG_SDRAM_BASE != PAGE_OFFSET
+/*
+ * Kernel mapped to virtual ram address.
+ *
+ * M5445x:
+ * Data[0]: 0xF0000000 -> 0xFFFFFFFF System regs
+ * Data[1]: 0xA0000000 -> 0xAFFFFFFF PCI
+ * Code[0]: Not Mapped
+ * Code[1]: Not Mapped
+ *
+ * M547x/M548x
+ * Data[0]: 0xF0000000 -> 0xFFFFFFFF System regs
+ * Data[1]: Not Mapped
+ * Code[0]: Not Mapped
+ * Code[1]: Not Mapped
+ */
+#if defined(CONFIG_M5445X)
+#define ACR0_DEFAULT #0xF00FA048 /* System regs */
+#define ACR1_DEFAULT #0xA00FA048 /* PCI */
+#define ACR2_DEFAULT #0x00000000 /* Not Mapped */
+#define ACR3_DEFAULT #0x00000000 /* Not Mapped */
+#elif defined(CONFIG_M547X_8X)
+#define ACR0_DEFAULT #0xF00FA048 /* System Regs */
+#define ACR1_DEFAULT #0x00000000 /* Not Mapped */
+#define ACR2_DEFAULT #0x00000000 /* Not Mapped */
+#define ACR3_DEFAULT #0x00000000 /* Not Mapped */
+#endif
+
+#else /* CONFIG_SDRAM_BASE = PAGE_OFFSET */
+/*
+ * Kernel mapped to physical ram address.
+ *
+ * M5445x:
+ * Data[0]: 0xF0000000 -> 0xFFFFFFFF System regs
+ * Data[1]: 0x40000000 -> 0x4FFFFFFF SDRAM - uncached
+ * Code[0]: Not Mapped
+ * Code[1]: 0x40000000 -> 0x4FFFFFFF SDRAM - cached
+ *
+ * M547x/M548x
+ * Data[0]: 0xF0000000 -> 0xFFFFFFFF System regs
+ * Data[1]: 0x00000000 -> 0x0FFFFFFF SDRAM - uncached
+ * Code[0]: Not Mapped
+ * Code[1]: 0x00000000 -> 0x0FFFFFFF SDRAM - cached
+ */
+#if defined(CONFIG_M5445X)
+#define ACR0_DEFAULT #0xF00FA048 /* System Regs */
+#define ACR1_DEFAULT #0x400FA048 /* SDRAM uncached */
+#define ACR2_DEFAULT #0x00000000 /* Not mapped */
+#define ACR3_DEFAULT #0x400FA008 /* SDRAM cached */
+#elif defined(CONFIG_M547X_8X)
+#define ACR0_DEFAULT #0xF00FA048 /* System Regs */
+#define ACR1_DEFAULT #0x000FA048 /* SDRAM uncached */
+#define ACR2_DEFAULT #0x00000000 /* Not mapped */
+#define ACR3_DEFAULT #0x000FA008 /* SDRAM cached */
+#endif
+#endif
+
+/* Several macros to make the writing of subroutines easier:
+ * - func_start marks the beginning of the routine which setups the frame
+ * register and saves the registers, it also defines another macro
+ * to automatically restore the registers again.
+ * - func_return marks the end of the routine and simply calls the prepared
+ * macro to restore registers and jump back to the caller.
+ * - func_define generates another macro to automatically put arguments
+ * onto the stack call the subroutine and cleanup the stack again.
+ */
+
+.macro load_symbol_address symbol,register
+ movel #\symbol,\register
+.endm
+
+.macro func_start name,saveregs,savesize,stack=0
+L(\name):
+ linkw %a6,#-\stack
+ subal #(\savesize),%sp
+ moveml \saveregs,%sp@
+.set stackstart,-\stack
+
+.macro func_return_\name
+ moveml %sp@,\saveregs
+ addal #(\savesize),%sp
+ unlk %a6
+ rts
+.endm
+.endm
+
+.macro func_return name
+ func_return_\name
+.endm
+
+.macro func_call name
+ jbsr L(\name)
+.endm
+
+.macro move_stack nr,arg1,arg2,arg3,arg4
+.if \nr
+ move_stack "(\nr-1)",\arg2,\arg3,\arg4
+ movel \arg1,%sp@-
+.endif
+.endm
+
+.macro func_define name,nr=0
+.macro \name arg1,arg2,arg3,arg4
+ move_stack \nr,\arg1,\arg2,\arg3,\arg4
+ func_call \name
+.if \nr
+ lea %sp@(\nr*4),%sp
+.endif
+.endm
+.endm
+
+func_define serial_putc,1
+
+.macro putc ch
+ pea \ch
+ func_call serial_putc
+ addql #4,%sp
+.endm
+
+.macro dputc ch
+#ifdef DEBUG
+ putc \ch
+#endif
+.endm
+
+func_define putn,1
+
+.macro dputn nr
+#ifdef DEBUG
+ putn \nr
+#endif
+.endm
+
+#if CONFIG_SDRAM_BASE != PAGE_OFFSET
+/*
+ mmu_map - creates a new TLB entry
+
+ virt_addr Must be on proper boundary
+ phys_addr Must be on proper boundary
+ itlb MMUOR_ITLB if instruction TLB or 0
+ asid address space ID
+ shared_global MMUTR_SG if shared between different ASIDs or 0
+ size_code MMUDR_SZ1M 1 MB
+ MMUDR_SZ4K 4 KB
+ MMUDR_SZ8K 8 KB
+ MMUDR_SZ16M 16 MB
+ cache_mode MMUDR_INC instruction non-cacheable
+ MMUDR_IC instruction cacheable
+ MMUDR_DWT data writethrough
+ MMUDR_DCB data copyback
+ MMUDR_DNCP data non-cacheable, precise
+ MMUDR_DNCIP data non-cacheable, imprecise
+ super_prot MMUDR_SP if user mode generates exception or 0
+ readable MMUDR_R if permits read access (data TLB) or 0
+ writable MMUDR_W if permits write access (data TLB) or 0
+ executable MMUDR_X if permits execute access (instruction TLB) or 0
+ locked MMUDR_LK prevents TLB entry from being replaced or 0
+ temp_data_reg a data register to use for temporary values
+*/
+.macro mmu_map virt_addr,phys_addr,itlb,asid,shared_global,size_code,cache_mode,super_prot,readable,writable,executable,locked,temp_data_reg
+ /* Set up search of TLB. */
+ movel #(\virt_addr+1), \temp_data_reg
+ movel \temp_data_reg, MMUAR
+ /* Search. */
+ movel #(MMUOR_STLB + MMUOR_ADR +\itlb), \temp_data_reg
+ movew \temp_data_reg, (MMUOR)
+ /* Set up tag value. */
+ movel #(\virt_addr + \asid + \shared_global + MMUTR_V), \temp_data_reg
+ movel \temp_data_reg, MMUTR
+ /* Set up data value. */
+ movel #(\phys_addr + \size_code + \cache_mode + \super_prot + \readable + \writable + \executable + \locked), \temp_data_reg
+ movel \temp_data_reg, MMUDR
+ /* Save it. */
+ movel #(MMUOR_ACC + MMUOR_UAA + \itlb), \temp_data_reg
+ movew \temp_data_reg, (MMUOR)
+.endm /* mmu_map */
+
+.macro mmu_unmap virt_addr,itlb,temp_data_reg
+ /* Set up search of TLB. */
+ movel #(\virt_addr+1), \temp_data_reg
+ movel \temp_data_reg, MMUAR
+ /* Search. */
+ movel #(MMUOR_STLB + MMUOR_ADR +\itlb), \temp_data_reg
+ movew \temp_data_reg, (MMUOR)
+ /* Test for hit. */
+ movel MMUSR,\temp_data_reg
+ btst #MMUSR_HITN,\temp_data_reg
+ beq 1f
+ /* Read the TLB. */
+ movel #(MMUOR_RW + MMUOR_ACC +\itlb), \temp_data_reg
+ movew \temp_data_reg, (MMUOR)
+ movel MMUSR,\temp_data_reg
+ /* Set up tag value. */
+ movel #0, \temp_data_reg
+ movel \temp_data_reg, MMUTR
+ /* Set up data value. */
+ movel #0, \temp_data_reg
+ movel \temp_data_reg, MMUDR
+ /* Save it. */
+ movel #(MMUOR_ACC + MMUOR_UAA + \itlb), \temp_data_reg
+ movew \temp_data_reg, (MMUOR)
+1:
+.endm /* mmu_unmap */
+#endif /* CONFIG_SDRAM_BASE != PAGE_OFFSET */
+
+/* .text */
+.section ".text.head","ax"
+ENTRY(_stext)
+/* Version numbers of the bootinfo interface -- if we later pass info
+ * from boot ROM we might want to put something real here.
+ *
+ * The area from _stext to _start will later be used as kernel pointer table
+ */
+ bras 1f /* Jump over bootinfo version numbers */
+
+ .long BOOTINFOV_MAGIC
+ .long 0
+#if CONFIG_SDRAM_BASE != PAGE_OFFSET
+1: jmp __start-(0xc0000000-CONFIG_SDRAM_BASE)
+#else
+1: jmp __start
+#endif
+
+.equ kernel_pg_dir,_stext
+.equ .,_stext+0x1000
+
+ENTRY(_start)
+ jra __start
+__INIT
+ENTRY(__start)
+ movew #0x2700,%sr /* no interrupts */
+#if defined(CONFIG_UBOOT)
+ movel %sp,uboot_init_sp /* save initial stack pointer */
+#endif
+
+/* Setup initial stack pointer */
+ movel #CONFIG_SDRAM_BASE+0x1000,%sp
+
+/* Setup usp */
+ subl %a0,%a0
+ movel %a0,%usp
+
+#if defined(CONFIG_M5445X)
+ movel #0x80000000, %d0
+ movec %d0, %rambar1
+#elif defined(CONFIG_M547X_8X)
+ movel #MCF_MBAR, %d0
+ movec %d0, %mbar
+ move.l #(MCF_RAMBAR0 + 0x21), %d0
+ movec %d0, %rambar0
+ move.l #(MCF_RAMBAR1 + 0x21), %d0
+ movec %d0, %rambar1
+#endif
+
+/* reset cache */
+ movel #(CF_CACR_ICINVA + CF_CACR_DCINVA),%d0
+ movecl %d0,%cacr
+
+ movel #(MMU_BASE+1),%d0
+ movecl %d0,%mmubar
+ movel #MMUOR_CA,%a0 /* Clear tlb entries */
+ movew %a0,(MMUOR)
+ movel #(MMUOR_CA + MMUOR_ITLB),%a0 /* Use ITLB for searches */
+ movew %a0,(MMUOR)
+ movel #0,%a0 /* Clear Addr Space User ID */
+ movecl %a0,%asid
+
+/* setup ACRs */
+ movel ACR0_DEFAULT, %d0 /* ACR0 (DATA) setup */
+ movec %d0, %acr0
+ nop
+ movel ACR1_DEFAULT, %d0 /* ACR1 (DATA) setup */
+ movec %d0, %acr1
+ nop
+ movel ACR2_DEFAULT, %d0 /* ACR2 (CODE) setup */
+ movec %d0, %acr2
+ nop
+ movel ACR3_DEFAULT, %d0 /* ACR3 (CODE) setup */
+ movec %d0, %acr3
+ nop
+
+ /* If you change the memory size to another value make a matching
+ change in paging_init(cf-mmu.c) to zones_size[]. */
+
+#if CONFIG_SDRAM_BASE != PAGE_OFFSET
+#if defined(CONFIG_M5445X)
+ /* Map 256MB as code */
+ mmu_map (PAGE_OFFSET+0*0x1000000), (PHYS_OFFSET+0*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+1*0x1000000), (PHYS_OFFSET+1*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+2*0x1000000), (PHYS_OFFSET+2*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+3*0x1000000), (PHYS_OFFSET+3*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+4*0x1000000), (PHYS_OFFSET+4*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+5*0x1000000), (PHYS_OFFSET+5*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+6*0x1000000), (PHYS_OFFSET+6*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+7*0x1000000), (PHYS_OFFSET+7*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+8*0x1000000), (PHYS_OFFSET+8*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+9*0x1000000), (PHYS_OFFSET+9*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+10*0x1000000), (PHYS_OFFSET+10*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+11*0x1000000), (PHYS_OFFSET+11*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+12*0x1000000), (PHYS_OFFSET+12*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+13*0x1000000), (PHYS_OFFSET+13*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+14*0x1000000), (PHYS_OFFSET+14*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+15*0x1000000), (PHYS_OFFSET+15*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_IC, MMUDR_SP, \
+ 0, 0, MMUDR_X, MMUDR_LK, %d0
+
+ /* Map 256MB as data also */
+ mmu_map (PAGE_OFFSET+0*0x1000000), (PHYS_OFFSET+0*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+1*0x1000000), (PHYS_OFFSET+1*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+2*0x1000000), (PHYS_OFFSET+2*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+3*0x1000000), (PHYS_OFFSET+3*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+4*0x1000000), (PHYS_OFFSET+4*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+5*0x1000000), (PHYS_OFFSET+5*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+6*0x1000000), (PHYS_OFFSET+6*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+7*0x1000000), (PHYS_OFFSET+7*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+8*0x1000000), (PHYS_OFFSET+8*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+9*0x1000000), (PHYS_OFFSET+9*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+10*0x1000000), (PHYS_OFFSET+10*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+11*0x1000000), (PHYS_OFFSET+11*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+12*0x1000000), (PHYS_OFFSET+12*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+13*0x1000000), (PHYS_OFFSET+13*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+14*0x1000000), (PHYS_OFFSET+14*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+15*0x1000000), (PHYS_OFFSET+15*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+
+ /* Map ATA registers -- sacrifice a data TLB due to the hw design */
+ mmu_map (0x90000000), (0x90000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, MMUDR_LK, %d0
+
+#elif defined(CONFIG_M547X_8X)
+
+ /* Map first 8 MB as code */
+ mmu_map (PAGE_OFFSET+0*1024*1024), (0*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, MMUDR_X, \
+ MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+1*1024*1024), (1*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, MMUDR_X, \
+ MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+2*1024*1024), (2*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, MMUDR_X, \
+ MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+3*1024*1024), (3*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, MMUDR_X, \
+ MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+4*1024*1024), (4*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, MMUDR_X, \
+ MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+5*1024*1024), (5*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, MMUDR_X, \
+ MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+6*1024*1024), (6*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, MMUDR_X, \
+ MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+7*1024*1024), (7*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, MMUDR_X, \
+ MMUDR_LK, %d0
+
+ /* Map first 8 MB as data */
+ mmu_map (PAGE_OFFSET+0*1024*1024), (0*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+1*1024*1024), (1*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+2*1024*1024), (2*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+3*1024*1024), (3*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+4*1024*1024), (4*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+5*1024*1024), (5*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+6*1024*1024), (6*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, MMUDR_LK, %d0
+ mmu_map (PAGE_OFFSET+7*1024*1024), (7*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, MMUDR_LK, %d0
+#endif
+ /*
+ * Do unity mapping to enable the MMU. Map first chunk of memory
+ * in place as code/data. The TLBs will be deleted after the MMU is
+ * enabled and we are executing in high memory.
+ */
+
+#if defined(CONFIG_M5445X)
+ /* Map first 16 MB as code */
+ mmu_map (PHYS_OFFSET+0*0x1000000), (PHYS_OFFSET+0*0x1000000), \
+ MMUOR_ITLB, 0, MMUTR_SG, MMUDR_SZ16M, MMUDR_INC, MMUDR_SP, 0, \
+ 0, MMUDR_X, 0, %d0
+ /* Map first 16 MB as data too */
+ mmu_map (PHYS_OFFSET+0*0x1000000), (PHYS_OFFSET+0*0x1000000), 0, 0, \
+ MMUTR_SG, MMUDR_SZ16M, MMUDR_DNCP, MMUDR_SP, MMUDR_R, MMUDR_W, \
+ 0, 0, %d0
+#elif defined(CONFIG_M547X_8X)
+ /* Map first 4 MB as code */
+ mmu_map (0*1024*1024), (0*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, \
+ MMUDR_X, 0, %d0
+ mmu_map (1*1024*1024), (1*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, \
+ MMUDR_X, 0, %d0
+ mmu_map (2*1024*1024), (2*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, \
+ MMUDR_X, 0, %d0
+ mmu_map (3*1024*1024), (3*1024*1024), MMUOR_ITLB, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_IC, MMUDR_SP, 0, 0, \
+ MMUDR_X, 0, %d0
+
+ /* Map first 4 MB as data too */
+ mmu_map (0*1024*1024), (0*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DCB, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, 0, %d0
+ mmu_map (1*1024*1024), (1*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DCB, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, 0, %d0
+ mmu_map (2*1024*1024), (2*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DCB, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, 0, %d0
+ mmu_map (3*1024*1024), (3*1024*1024), 0, 0, \
+ MMUTR_SG, MMUDR_SZ1M, MMUDR_DCB, MMUDR_SP, MMUDR_R, \
+ MMUDR_W, 0, 0, %d0
+#endif
+#endif /* CONFIG_SDRAM_BASE != PAGE_OFFSET */
+
+ /* Turn on MMU */
+ movel #(MMUCR_EN),%a0
+ movel %a0,MMUCR
+ nop /* This synchs the pipeline after a write to MMUCR */
+
+ movel #__running_high,%a0 /* Get around PC-relative addressing. */
+ jmp %a0@
+
+ENTRY(__running_high)
+ load_symbol_address _stext,%sp
+ movel L(memory_start),%a0
+ movel %a0,availmem
+ load_symbol_address L(phys_kernel_start),%a0
+ load_symbol_address _stext,%a1
+ subl #_stext,%a1
+ addl #PAGE_OFFSET,%a1
+ movel %a1,%a0@
+
+/* zero bss */
+ lea _sbss,%a0
+ lea _ebss,%a1
+ clrl %d0
+_loop_bss:
+ movel %d0,(%a0)+
+ cmpl %a0,%a1
+ bne _loop_bss
+
+ /* Unmap unity mappings */
+#if CONFIG_SDRAM_BASE != PAGE_OFFSET
+#if defined(CONFIG_M5445X)
+ mmu_unmap (PHYS_OFFSET+0*0x1000000), MMUOR_ITLB, %d0
+ mmu_unmap (PHYS_OFFSET+0*0x1000000), 0, %d0
+#elif defined(CONFIG_M547X_8X)
+ mmu_unmap (PHYS_OFFSET+0*0x1000000), MMUOR_ITLB, %d0
+ mmu_unmap (PHYS_OFFSET+1*0x1000000), MMUOR_ITLB, %d0
+ mmu_unmap (PHYS_OFFSET+2*0x1000000), MMUOR_ITLB, %d0
+ mmu_unmap (PHYS_OFFSET+3*0x1000000), MMUOR_ITLB, %d0
+ mmu_unmap (PHYS_OFFSET+0*0x1000000), 0, %d0
+ mmu_unmap (PHYS_OFFSET+1*0x1000000), 0, %d0
+ mmu_unmap (PHYS_OFFSET+2*0x1000000), 0, %d0
+ mmu_unmap (PHYS_OFFSET+3*0x1000000), 0, %d0
+#endif
+#endif /* CONFIG_SDRAM_BASE != PAGE_OFFSET */
+
+ /*
+ * Load the current task pointer and stack.
+ */
+ lea init_thread_union,%a0
+ lea THREAD_SIZE(%a0),%sp
+
+#ifdef CONFIG_MCF_USER_HALT
+/* Setup debug control reg to allow halts from user space */
+ lea wdbg_uhe,%a0
+ wdebug (%a0)
+#endif
+
+
+#ifdef CONFIG_UBOOT
+ /* save the uboot structure to variable */
+ mov uboot_init_sp, %a4
+ addl #0x00000004,%a4 /* offset past top */
+ addl #(PAGE_OFFSET-CONFIG_SDRAM_BASE),%a4 /* high mem offset */
+ movel %a4,uboot_info_stk /* save uboot info to variable */
+#endif
+
+ /* Continuing in C code */
+ bsr cf_early_init
+ jmp start_kernel
+
+.section ".text.head","ax"
+set_context:
+func_start set_context,%d0,(1*4)
+ movel 12(%sp),%d0
+ movec %d0,%asid
+func_return set_context
+
+#ifdef CONFIG_M5445X
+/*
+ * set_fpga(addr,val) on the M5445X
+ *
+ * Map in 0x00000000 -> 0x0fffffff and then do the write.
+ */
+set_fpga:
+#if 0
+ movew %sr,%d1
+ movew #0x2700,%sr
+ movel ACR0_FPGA, %d0
+ movec %d0, %acr0
+ nop
+ moveal 4(%sp),%a0
+ movel 8(%sp),%a0@
+ movel ACR0_DEFAULT, %d0
+ movec %d0, %acr0
+ nop
+ movew %d1,%sr
+#endif
+ rts
+#endif
+
+ .data
+ .align 4
+
+availmem:
+ .long 0
+L(phys_kernel_start):
+ .long PAGE_OFFSET
+L(kernel_end):
+ .long 0
+L(memory_start):
+ .long PAGE_OFFSET_RAW
+
+#if defined(CONFIG_UBOOT)
+L(uboot_init_sp):
+.long 0
+#endif
+
+#ifdef CONFIG_MCF_USER_HALT
+/*
+ * Enable User Halt Enable in the debug control register.
+ */
+wdbg_uhe:
+ .word 0x2c80 /* DR0 */
+ .word 0x00b0 /* 31:16 */
+ .word 0x0400 /* 15:0 -- enable UHE */
+ .word 0x0000 /* unused */
+#endif
+
+
projects / mcf548x / linux.git / commitdiff