+++ /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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