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openwrt/target/linux/coldfire/patches/005-mcfv4e_kernel_mods.patch

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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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