--- /dev/null
+From 823ad3e6e88353226ec28f48183a467181887a1b Mon Sep 17 00:00:00 2001
+From: Kurt Mahan <kmahan@freescale.com>
+Date: Wed, 31 Oct 2007 16:56:09 -0600
+Subject: [PATCH] Core Coldfire/MCF54455 kernel changes.
+
+LTIBName: mcfv4e-kernel-mods
+Signed-off-by: Kurt Mahan <kmahan@freescale.com>
+---
+ arch/m68k/Kconfig | 65 ++++++++++++++++++++++++++++++++++++++-
+ arch/m68k/Kconfig.debug | 9 +++++
+ arch/m68k/Makefile | 14 ++++++++
+ arch/m68k/kernel/Makefile | 15 ++++++---
+ arch/m68k/kernel/asm-offsets.c | 7 ++++
+ arch/m68k/kernel/dma.c | 17 ++++++++++
+ arch/m68k/kernel/process.c | 57 +++++++++++++++++++++++++++++++++++
+ arch/m68k/kernel/setup.c | 49 ++++++++++++++++++++++++++----
+ arch/m68k/kernel/time.c | 5 +++
+ arch/m68k/kernel/vmlinux.lds.S | 2 +
+ 10 files changed, 227 insertions(+), 13 deletions(-)
+
+--- a/arch/m68k/Kconfig
++++ b/arch/m68k/Kconfig
+@@ -119,6 +119,20 @@ config SUN3
+
+ If you don't want to compile a kernel exclusively for a Sun 3, say N.
+
++config COLDFIRE
++ bool "ColdFire V4e support"
++ default y
++ select CFV4E
++ help
++ Say Y if you want to build a kernel to run on one of the ColdFire
++ V4e boards.
++
++config CFV4E
++ bool
++ depends on COLDFIRE
++ select MMU_CFV4E if MMU
++ default y
++
+ config AMIGA
+ bool "Amiga support"
+ depends on !MMU_SUN3
+@@ -294,14 +308,53 @@ config M68060
+ If you anticipate running this kernel on a computer with a MC68060
+ processor, say Y. Otherwise, say N.
+
++config M54455
++ bool "MCF54455 support"
++ depends on COLDFIRE
++ default y
++ help
++ This option will add support for the MCF54455 processor with mmu.
++
++config MCFCLK
++ int "M54455EVB System Clock"
++ depends on M54455
++ default 266666666
++ help
++ System clock for EVB. Usually 266MHz for u-boot and 200MHz for dBUG.
++
++config MCF_USER_HALT
++ bool "Coldfire User Halt Enable"
++ depends on M54455
++ default n
++ help
++ Enables the HALT instruction in User Mode.
++
+ config MMU_MOTOROLA
+ bool
+- depends on MMU && !MMU_SUN3
++ depends on MMU && !MMU_SUN3 && !COLDFIRE
+ default y
+
+ config MMU_SUN3
+ bool
+
++config MMU_CFV4E
++ bool
++
++config SDRAM_BASE
++ hex
++ depends on M54455
++ default 0x40000000
++
++config SDRAM_SIZE
++ hex
++ depends on M54455
++ default 0x0FFFFFFF
++
++config NOR_FLASH_BASE
++ hex "NOR Flash Base Address"
++ depends on M54455
++ default 0x00000000
++
+ config M68KFPU_EMU
+ bool "Math emulation support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+@@ -468,6 +521,14 @@ config ZONE_DMA
+ source "drivers/pci/Kconfig"
+
+ source "drivers/zorro/Kconfig"
++endmenu
++
++menu "Power management options"
++
++config PM
++ bool "Power Management support"
++ help
++ Support processor power management modes
+
+ endmenu
+
+@@ -647,7 +708,7 @@ config DN_SERIAL
+
+ config SERIAL_CONSOLE
+ bool "Support for serial port console"
+- depends on (AMIGA || ATARI || MAC || SUN3 || SUN3X || VME || APOLLO) && (ATARI_MFPSER=y || ATARI_SCC=y || ATARI_MIDI=y || MAC_SCC=y || AMIGA_BUILTIN_SERIAL=y || GVPIOEXT=y || MULTIFACE_III_TTY=y || SERIAL=y || MVME147_SCC || SERIAL167 || MVME162_SCC || BVME6000_SCC || DN_SERIAL)
++ depends on (AMIGA || ATARI || MAC || SUN3 || SUN3X || VME || APOLLO || COLDFIRE) && (ATARI_MFPSER=y || ATARI_SCC=y || ATARI_MIDI=y || MAC_SCC=y || AMIGA_BUILTIN_SERIAL=y || GVPIOEXT=y || MULTIFACE_III_TTY=y || SERIAL=y || MVME147_SCC || SERIAL167 || MVME162_SCC || BVME6000_SCC || DN_SERIAL || SERIAL_COLDFIRE)
+ ---help---
+ If you say Y here, it will be possible to use a serial port as the
+ system console (the system console is the device which receives all
+--- a/arch/m68k/Kconfig.debug
++++ b/arch/m68k/Kconfig.debug
+@@ -2,4 +2,13 @@ menu "Kernel hacking"
+
+ source "lib/Kconfig.debug"
+
++config BOOTPARAM
++ bool 'Compiled-in Kernel Boot Parameter'
++ depends on COLDFIRE
++
++config BOOTPARAM_STRING
++ string 'Kernel Boot Parameter'
++ default 'console=ttyS0,115200'
++ depends on BOOTPARAM
++
+ endmenu
+--- a/arch/m68k/Makefile
++++ b/arch/m68k/Makefile
+@@ -16,7 +16,9 @@
+ KBUILD_DEFCONFIG := amiga_defconfig
+
+ # override top level makefile
++ifndef CONFIG_COLDFIRE
+ AS += -m68020
++endif
+ LDFLAGS := -m m68kelf
+ LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds
+ ifneq ($(SUBARCH),$(ARCH))
+@@ -36,6 +38,7 @@ CHECKFLAGS += -D__mc68000__
+ KBUILD_CFLAGS += -pipe -fno-strength-reduce -ffixed-a2
+
+ # enable processor switch if compiled only for a single cpu
++ifndef CONFIG_COLDFIRE
+ ifndef CONFIG_M68020
+ ifndef CONFIG_M68030
+
+@@ -49,6 +52,12 @@ endif
+
+ endif
+ endif
++endif
++
++ifdef CONFIG_M54455
++CFLAGS := $(CFLAGS) -march=isac -mcpu=54455 -msoft-float -g
++AFLAGS := $(AFLAGS) -march=isac -mcpu=54455 -msoft-float
++endif
+
+ ifdef CONFIG_KGDB
+ # If configured for kgdb support, include debugging infos and keep the
+@@ -57,8 +66,12 @@ KBUILD_CFLAGS := $(subst -fomit-frame-po
+ endif
+
+ ifndef CONFIG_SUN3
++ifndef CONFIG_COLDFIRE
+ head-y := arch/m68k/kernel/head.o
+ else
++head-y := arch/m68k/coldfire/head.o
++endif
++else
+ head-y := arch/m68k/kernel/sun3-head.o
+ endif
+
+@@ -79,6 +92,7 @@ core-$(CONFIG_SUN3) += arch/m68k/sun3/
+ core-$(CONFIG_M68040) += arch/m68k/fpsp040/
+ core-$(CONFIG_M68060) += arch/m68k/ifpsp060/
+ core-$(CONFIG_M68KFPU_EMU) += arch/m68k/math-emu/
++core-$(CONFIG_COLDFIRE) += arch/m68k/coldfire/
+
+ all: zImage
+
+--- a/arch/m68k/kernel/Makefile
++++ b/arch/m68k/kernel/Makefile
+@@ -2,14 +2,19 @@
+ # Makefile for the linux kernel.
+ #
+
+-ifndef CONFIG_SUN3
+- extra-y := head.o
++ifdef CONFIG_SUN3
++ extra-y := sun3-head.o vmlinux.lds
++ obj-y := entry.o signal.o ints.o
+ else
+- extra-y := sun3-head.o
++ifndef CONFIG_COLDFIRE
++ extra-y := head.o vmlinux.lds
++ obj-y := entry.o signal.o traps.o ints.o
++else # CONFIG_COLDFIRE
++ extra-y := ../coldfire/head.o vmlinux.lds
++endif
+ endif
+-extra-y += vmlinux.lds
+
+-obj-y := entry.o process.o traps.o ints.o signal.o ptrace.o module.o \
++obj-y += process.o ptrace.o module.o \
+ sys_m68k.o time.o semaphore.o setup.o m68k_ksyms.o devres.o
+
+ devres-y = ../../../kernel/irq/devres.o
+--- a/arch/m68k/kernel/asm-offsets.c
++++ b/arch/m68k/kernel/asm-offsets.c
+@@ -58,8 +58,15 @@ int main(void)
+ DEFINE(PT_A2, offsetof(struct pt_regs, a2));
+ DEFINE(PT_PC, offsetof(struct pt_regs, pc));
+ DEFINE(PT_SR, offsetof(struct pt_regs, sr));
++#ifdef CONFIG_COLDFIRE
++ /* Need to get the context out of struct mm for ASID setting */
++ DEFINE(MM_CONTEXT, offsetof(struct mm_struct, context));
++ /* Coldfire exception frame has vector *before* pc */
++ DEFINE(PT_VECTOR, offsetof(struct pt_regs, pc) - 4);
++#else
+ /* bitfields are a bit difficult */
+ DEFINE(PT_VECTOR, offsetof(struct pt_regs, pc) + 4);
++#endif
+
+ /* offsets into the irq_handler struct */
+ DEFINE(IRQ_HANDLER, offsetof(struct irq_node, handler));
+--- a/arch/m68k/kernel/dma.c
++++ b/arch/m68k/kernel/dma.c
+@@ -17,6 +17,7 @@
+ void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *handle, gfp_t flag)
+ {
++#ifndef CONFIG_M54455
+ struct page *page, **map;
+ pgprot_t pgprot;
+ void *addr;
+@@ -55,6 +56,18 @@ void *dma_alloc_coherent(struct device *
+ kfree(map);
+
+ return addr;
++#else
++ /*
++ * On the M5445x platform the memory allocated with GFP_DMA
++ * is guaranteed to be DMA'able.
++ */
++ void *addr;
++
++ size = PAGE_ALIGN(size);
++ addr = kmalloc(size, GFP_DMA);
++ *handle = virt_to_phys(addr);
++ return addr;
++#endif
+ }
+ EXPORT_SYMBOL(dma_alloc_coherent);
+
+@@ -62,7 +75,11 @@ void dma_free_coherent(struct device *de
+ void *addr, dma_addr_t handle)
+ {
+ pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
++#ifndef CONFIG_M54455
+ vfree(addr);
++#else
++ kfree(addr);
++#endif
+ }
+ EXPORT_SYMBOL(dma_free_coherent);
+
+--- a/arch/m68k/kernel/process.c
++++ b/arch/m68k/kernel/process.c
+@@ -191,6 +191,7 @@ EXPORT_SYMBOL(kernel_thread);
+
+ void flush_thread(void)
+ {
++#if !defined(CONFIG_COLDFIRE)
+ unsigned long zero = 0;
+ set_fs(USER_DS);
+ current->thread.fs = __USER_DS;
+@@ -198,6 +199,14 @@ void flush_thread(void)
+ asm volatile (".chip 68k/68881\n\t"
+ "frestore %0@\n\t"
+ ".chip 68k" : : "a" (&zero));
++#else
++ set_fs(USER_DS);
++ current->thread.fs = USER_DS;
++#if defined(CONFIG_FPU)
++ if (!FPU_IS_EMU)
++ asm volatile ("frestore %0@\n\t" : : "a" (&zero));
++#endif
++#endif
+ }
+
+ /*
+@@ -261,6 +270,7 @@ int copy_thread(int nr, unsigned long cl
+ * Must save the current SFC/DFC value, NOT the value when
+ * the parent was last descheduled - RGH 10-08-96
+ */
++#if !defined(CONFIG_COLDFIRE)
+ p->thread.fs = get_fs().seg;
+
+ if (!FPU_IS_EMU) {
+@@ -272,9 +282,34 @@ int copy_thread(int nr, unsigned long cl
+ "fmoveml %/fpiar/%/fpcr/%/fpsr,%1"
+ : : "m" (p->thread.fp[0]), "m" (p->thread.fpcntl[0])
+ : "memory");
++#else
++ p->thread.fs = get_fs();
++
++#if defined(CONFIG_FPU)
++ if (!FPU_IS_EMU) {
++ /* Copy the current fpu state */
++ asm volatile ("fsave %0" : : "m" (p->thread.fpstate[0])
++ : "memory");
++
++ if (p->thread.fpstate[0]) {
++ asm volatile ("fmovemd %/fp0-%/fp7,%0"
++ : : "m" (p->thread.fp[0])
++ : "memory");
++ asm volatile ("fmovel %/fpiar,%0"
++ : : "m" (p->thread.fpcntl[0])
++ : "memory");
++ asm volatile ("fmovel %/fpcr,%0"
++ : : "m" (p->thread.fpcntl[1])
++ : "memory");
++ asm volatile ("fmovel %/fpsr,%0"
++ : : "m" (p->thread.fpcntl[2])
++ : "memory");
++ }
+ /* Restore the state in case the fpu was busy */
+ asm volatile ("frestore %0" : : "m" (p->thread.fpstate[0]));
+ }
++#endif
++#endif
+
+ return 0;
+ }
+@@ -283,7 +318,9 @@ int copy_thread(int nr, unsigned long cl
+
+ int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu)
+ {
++#if !defined(CONFIG_COLDFIRE) || defined(CONFIG_FPU)
+ char fpustate[216];
++#endif
+
+ if (FPU_IS_EMU) {
+ int i;
+@@ -300,6 +337,7 @@ int dump_fpu (struct pt_regs *regs, stru
+ }
+
+ /* First dump the fpu context to avoid protocol violation. */
++#if !defined(CONFIG_COLDFIRE)
+ asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory");
+ if (!CPU_IS_060 ? !fpustate[0] : !fpustate[2])
+ return 0;
+@@ -310,6 +348,25 @@ int dump_fpu (struct pt_regs *regs, stru
+ asm volatile ("fmovemx %/fp0-%/fp7,%0"
+ :: "m" (fpu->fpregs[0])
+ : "memory");
++#elif defined(CONFIG_FPU)
++ asm volatile ("fsave %0" :: "m" (fpustate[0]) : "memory");
++ if (!CPU_IS_060 ? !fpustate[0] : !fpustate[2])
++ return 0;
++
++ asm volatile ("fmovel %/fpiar,%0"
++ : : "m" (fpu->fpcntl[0])
++ : "memory");
++ asm volatile ("fmovel %/fpcr,%0"
++ : : "m" (fpu->fpcntl[1])
++ : "memory");
++ asm volatile ("fmovel %/fpsr,%0"
++ : : "m" (fpu->fpcntl[2])
++ : "memory");
++ asm volatile ("fmovemd %/fp0-%/fp7,%0"
++ : : "m" (fpu->fpregs[0])
++ : "memory");
++#endif
++
+ return 1;
+ }
+ EXPORT_SYMBOL(dump_fpu);
+--- a/arch/m68k/kernel/setup.c
++++ b/arch/m68k/kernel/setup.c
+@@ -67,13 +67,22 @@ EXPORT_SYMBOL(m68k_memory);
+
+ struct mem_info m68k_ramdisk;
+
++#if !defined(CONFIG_COLDFIRE)
+ static char m68k_command_line[CL_SIZE];
++#else
++char m68k_command_line[CL_SIZE];
++unsigned long uboot_info_stk;
++EXPORT_SYMBOL(uboot_info_stk);
++#endif
+
+ void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
+ /* machine dependent irq functions */
+ void (*mach_init_IRQ) (void) __initdata = NULL;
+ void (*mach_get_model) (char *model);
+ int (*mach_get_hardware_list) (char *buffer);
++#ifdef CONFIG_COLDFIRE
++void (*mach_tick)(void);
++#endif
+ /* machine dependent timer functions */
+ unsigned long (*mach_gettimeoffset) (void);
+ int (*mach_hwclk) (int, struct rtc_time*);
+@@ -128,13 +137,17 @@ extern void config_hp300(void);
+ extern void config_q40(void);
+ extern void config_sun3x(void);
+
++#ifdef CONFIG_COLDFIRE
++void coldfire_sort_memrec(void);
++#endif
++
+ #define MASK_256K 0xfffc0000
+
+ extern void paging_init(void);
+
+ static void __init m68k_parse_bootinfo(const struct bi_record *record)
+ {
+- while (record->tag != BI_LAST) {
++ while ((record->tag != BI_LAST) && !(CONFIG_COLDFIRE)) {
+ int unknown = 0;
+ const unsigned long *data = record->data;
+
+@@ -192,7 +205,11 @@ static void __init m68k_parse_bootinfo(c
+ record->size);
+ }
+
+- m68k_realnum_memory = m68k_num_memory;
++#ifdef CONFIG_COLDFIRE
++ coldfire_sort_memrec();
++#endif
++
++ m68k_realnum_memory = m68k_num_memory;
+ #ifdef CONFIG_SINGLE_MEMORY_CHUNK
+ if (m68k_num_memory > 1) {
+ printk("Ignoring last %i chunks of physical memory\n",
+@@ -205,7 +222,9 @@ static void __init m68k_parse_bootinfo(c
+ void __init setup_arch(char **cmdline_p)
+ {
+ extern int _etext, _edata, _end;
++#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
+ int i;
++#endif
+
+ /* The bootinfo is located right after the kernel bss */
+ m68k_parse_bootinfo((const struct bi_record *)&_end);
+@@ -220,9 +239,10 @@ void __init setup_arch(char **cmdline_p)
+ * We should really do our own FPU check at startup.
+ * [what do we do with buggy 68LC040s? if we have problems
+ * with them, we should add a test to check_bugs() below] */
+-#ifndef CONFIG_M68KFPU_EMU_ONLY
++#if !defined(CONFIG_M68KFPU_EMU_ONLY) && defined(CONFIG_FPU)
+ /* clear the fpu if we have one */
+- if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060)) {
++ if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|
++ FPU_CFV4E)) {
+ volatile int zero = 0;
+ asm volatile ("frestore %0" : : "m" (zero));
+ }
+@@ -310,13 +330,18 @@ void __init setup_arch(char **cmdline_p)
+ config_sun3x();
+ break;
+ #endif
++#ifdef CONFIG_COLDFIRE
++ case MACH_CFMMU:
++ config_coldfire();
++ break;
++#endif
+ default:
+ panic("No configuration setup");
+ }
+
+ paging_init();
+
+-#ifndef CONFIG_SUN3
++#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
+ for (i = 1; i < m68k_num_memory; i++)
+ free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
+ m68k_memory[i].size);
+@@ -343,6 +368,10 @@ void __init setup_arch(char **cmdline_p)
+
+ #endif /* !CONFIG_SUN3 */
+
++#ifdef CONFIG_COLDFIRE
++ mmu_context_init();
++#endif
++
+ /* set ISA defs early as possible */
+ #if defined(CONFIG_ISA) && defined(MULTI_ISA)
+ #if defined(CONFIG_Q40)
+@@ -373,6 +402,7 @@ static int show_cpuinfo(struct seq_file
+ #define LOOP_CYCLES_68030 (8)
+ #define LOOP_CYCLES_68040 (3)
+ #define LOOP_CYCLES_68060 (1)
++#define LOOP_CYCLES_COLDFIRE (2)
+
+ if (CPU_IS_020) {
+ cpu = "68020";
+@@ -386,6 +416,9 @@ static int show_cpuinfo(struct seq_file
+ } else if (CPU_IS_060) {
+ cpu = "68060";
+ clockfactor = LOOP_CYCLES_68060;
++ } else if (CPU_IS_CFV4E) {
++ cpu = "ColdFire V4e";
++ clockfactor = LOOP_CYCLES_COLDFIRE;
+ } else {
+ cpu = "680x0";
+ clockfactor = 0;
+@@ -404,6 +437,8 @@ static int show_cpuinfo(struct seq_file
+ fpu = "68060";
+ else if (m68k_fputype & FPU_SUNFPA)
+ fpu = "Sun FPA";
++ else if (m68k_fputype & FPU_CFV4E)
++ fpu = "ColdFire V4e";
+ else
+ fpu = "none";
+ #endif
+@@ -420,6 +455,8 @@ static int show_cpuinfo(struct seq_file
+ mmu = "Sun-3";
+ else if (m68k_mmutype & MMU_APOLLO)
+ mmu = "Apollo";
++ else if (m68k_mmutype & MMU_CFV4E)
++ mmu = "ColdFire";
+ else
+ mmu = "unknown";
+
+@@ -482,7 +519,7 @@ int get_hardware_list(char *buffer)
+
+ void check_bugs(void)
+ {
+-#ifndef CONFIG_M68KFPU_EMU
++#if !defined(CONFIG_M68KFPU_EMU) && !defined(CONFIG_M54455)
+ if (m68k_fputype == 0) {
+ printk(KERN_EMERG "*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
+ "WHICH IS REQUIRED BY LINUX/M68K ***\n");
+--- a/arch/m68k/kernel/time.c
++++ b/arch/m68k/kernel/time.c
+@@ -40,6 +40,11 @@ static inline int set_rtc_mmss(unsigned
+ */
+ static irqreturn_t timer_interrupt(int irq, void *dummy)
+ {
++#ifdef CONFIG_COLDFIRE
++ /* kick hardware timer if necessary */
++ if (mach_tick)
++ mach_tick();
++#endif
+ do_timer(1);
+ #ifndef CONFIG_SMP
+ update_process_times(user_mode(get_irq_regs()));
+--- a/arch/m68k/kernel/vmlinux.lds.S
++++ b/arch/m68k/kernel/vmlinux.lds.S
+@@ -5,6 +5,8 @@ PHDRS
+ }
+ #ifdef CONFIG_SUN3
+ #include "vmlinux-sun3.lds"
++#elif CONFIG_COLDFIRE
++#include "../coldfire/vmlinux-cf.lds"
+ #else
+ #include "vmlinux-std.lds"
+ #endif
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