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-rw-r--r--arch/arm/kernel/setup.c279
1 files changed, 58 insertions, 221 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 2ca7038b67a7..1f1eecca7f55 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -26,11 +26,13 @@
#include <linux/fs.h>
#include <asm/cpu.h>
+#include <asm/cputype.h>
#include <asm/elf.h>
#include <asm/procinfo.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/cacheflush.h>
+#include <asm/cachetype.h>
#include <asm/tlbflush.h>
#include <asm/mach/arch.h>
@@ -59,13 +61,14 @@ __setup("fpe=", fpe_setup);
extern void paging_init(struct meminfo *, struct machine_desc *desc);
extern void reboot_setup(char *str);
-extern int root_mountflags;
-extern void _stext, _text, _etext, __data_start, _edata, _end;
+extern void _text, _etext, __data_start, _edata, _end;
unsigned int processor_id;
EXPORT_SYMBOL(processor_id);
unsigned int __machine_arch_type;
EXPORT_SYMBOL(__machine_arch_type);
+unsigned int cacheid;
+EXPORT_SYMBOL(cacheid);
unsigned int __atags_pointer __initdata;
@@ -81,8 +84,6 @@ EXPORT_SYMBOL(system_serial_high);
unsigned int elf_hwcap;
EXPORT_SYMBOL(elf_hwcap);
-unsigned long __initdata vmalloc_reserve = 128 << 20;
-
#ifdef MULTI_CPU
struct processor processor;
@@ -111,9 +112,6 @@ static struct stack stacks[NR_CPUS];
char elf_platform[ELF_PLATFORM_SIZE];
EXPORT_SYMBOL(elf_platform);
-unsigned long phys_initrd_start __initdata = 0;
-unsigned long phys_initrd_size __initdata = 0;
-
static struct meminfo meminfo __initdata = { 0, };
static const char *cpu_name;
static const char *machine_name;
@@ -178,63 +176,6 @@ static struct resource io_res[] = {
#define lp1 io_res[1]
#define lp2 io_res[2]
-static const char *cache_types[16] = {
- "write-through",
- "write-back",
- "write-back",
- "undefined 3",
- "undefined 4",
- "undefined 5",
- "write-back",
- "write-back",
- "undefined 8",
- "undefined 9",
- "undefined 10",
- "undefined 11",
- "undefined 12",
- "undefined 13",
- "write-back",
- "undefined 15",
-};
-
-static const char *cache_clean[16] = {
- "not required",
- "read-block",
- "cp15 c7 ops",
- "undefined 3",
- "undefined 4",
- "undefined 5",
- "cp15 c7 ops",
- "cp15 c7 ops",
- "undefined 8",
- "undefined 9",
- "undefined 10",
- "undefined 11",
- "undefined 12",
- "undefined 13",
- "cp15 c7 ops",
- "undefined 15",
-};
-
-static const char *cache_lockdown[16] = {
- "not supported",
- "not supported",
- "not supported",
- "undefined 3",
- "undefined 4",
- "undefined 5",
- "format A",
- "format B",
- "undefined 8",
- "undefined 9",
- "undefined 10",
- "undefined 11",
- "undefined 12",
- "undefined 13",
- "format C",
- "undefined 15",
-};
-
static const char *proc_arch[] = {
"undefined/unknown",
"3",
@@ -255,61 +196,19 @@ static const char *proc_arch[] = {
"?(17)",
};
-#define CACHE_TYPE(x) (((x) >> 25) & 15)
-#define CACHE_S(x) ((x) & (1 << 24))
-#define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */
-#define CACHE_ISIZE(x) ((x) & 4095)
-
-#define CACHE_SIZE(y) (((y) >> 6) & 7)
-#define CACHE_ASSOC(y) (((y) >> 3) & 7)
-#define CACHE_M(y) ((y) & (1 << 2))
-#define CACHE_LINE(y) ((y) & 3)
-
-static inline void dump_cache(const char *prefix, int cpu, unsigned int cache)
-{
- unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
-
- printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n",
- cpu, prefix,
- mult << (8 + CACHE_SIZE(cache)),
- (mult << CACHE_ASSOC(cache)) >> 1,
- 8 << CACHE_LINE(cache),
- 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
- CACHE_LINE(cache)));
-}
-
-static void __init dump_cpu_info(int cpu)
-{
- unsigned int info = read_cpuid(CPUID_CACHETYPE);
-
- if (info != processor_id) {
- printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT",
- cache_types[CACHE_TYPE(info)]);
- if (CACHE_S(info)) {
- dump_cache("I cache", cpu, CACHE_ISIZE(info));
- dump_cache("D cache", cpu, CACHE_DSIZE(info));
- } else {
- dump_cache("cache", cpu, CACHE_ISIZE(info));
- }
- }
-
- if (arch_is_coherent())
- printk("Cache coherency enabled\n");
-}
-
int cpu_architecture(void)
{
int cpu_arch;
- if ((processor_id & 0x0008f000) == 0) {
+ if ((read_cpuid_id() & 0x0008f000) == 0) {
cpu_arch = CPU_ARCH_UNKNOWN;
- } else if ((processor_id & 0x0008f000) == 0x00007000) {
- cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
- } else if ((processor_id & 0x00080000) == 0x00000000) {
- cpu_arch = (processor_id >> 16) & 7;
+ } else if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
+ cpu_arch = (read_cpuid_id() & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
+ } else if ((read_cpuid_id() & 0x00080000) == 0x00000000) {
+ cpu_arch = (read_cpuid_id() >> 16) & 7;
if (cpu_arch)
cpu_arch += CPU_ARCH_ARMv3;
- } else if ((processor_id & 0x000f0000) == 0x000f0000) {
+ } else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
unsigned int mmfr0;
/* Revised CPUID format. Read the Memory Model Feature
@@ -330,6 +229,34 @@ int cpu_architecture(void)
return cpu_arch;
}
+static void __init cacheid_init(void)
+{
+ unsigned int cachetype = read_cpuid_cachetype();
+ unsigned int arch = cpu_architecture();
+
+ if (arch >= CPU_ARCH_ARMv7) {
+ cacheid = CACHEID_VIPT_NONALIASING;
+ if ((cachetype & (3 << 14)) == 1 << 14)
+ cacheid |= CACHEID_ASID_TAGGED;
+ } else if (arch >= CPU_ARCH_ARMv6) {
+ if (cachetype & (1 << 23))
+ cacheid = CACHEID_VIPT_ALIASING;
+ else
+ cacheid = CACHEID_VIPT_NONALIASING;
+ } else {
+ cacheid = CACHEID_VIVT;
+ }
+
+ printk("CPU: %s data cache, %s instruction cache\n",
+ cache_is_vivt() ? "VIVT" :
+ cache_is_vipt_aliasing() ? "VIPT aliasing" :
+ cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown",
+ cache_is_vivt() ? "VIVT" :
+ icache_is_vivt_asid_tagged() ? "VIVT ASID tagged" :
+ cache_is_vipt_aliasing() ? "VIPT aliasing" :
+ cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown");
+}
+
/*
* These functions re-use the assembly code in head.S, which
* already provide the required functionality.
@@ -346,10 +273,10 @@ static void __init setup_processor(void)
* types. The linker builds this table for us from the
* entries in arch/arm/mm/proc-*.S
*/
- list = lookup_processor_type(processor_id);
+ list = lookup_processor_type(read_cpuid_id());
if (!list) {
printk("CPU configuration botched (ID %08x), unable "
- "to continue.\n", processor_id);
+ "to continue.\n", read_cpuid_id());
while (1);
}
@@ -369,7 +296,7 @@ static void __init setup_processor(void)
#endif
printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
- cpu_name, processor_id, (int)processor_id & 15,
+ cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
proc_arch[cpu_architecture()], cr_alignment);
sprintf(init_utsname()->machine, "%s%c", list->arch_name, ENDIANNESS);
@@ -379,14 +306,14 @@ static void __init setup_processor(void)
elf_hwcap &= ~HWCAP_THUMB;
#endif
+ cacheid_init();
cpu_proc_init();
}
/*
* cpu_init - initialise one CPU.
*
- * cpu_init dumps the cache information, initialises SMP specific
- * information, and sets up the per-CPU stacks.
+ * cpu_init sets up the per-CPU stacks.
*/
void cpu_init(void)
{
@@ -398,9 +325,6 @@ void cpu_init(void)
BUG();
}
- if (system_state == SYSTEM_BOOTING)
- dump_cpu_info(cpu);
-
/*
* setup stacks for re-entrant exception handlers
*/
@@ -443,20 +367,6 @@ static struct machine_desc * __init setup_machine(unsigned int nr)
return list;
}
-static void __init early_initrd(char **p)
-{
- unsigned long start, size;
-
- start = memparse(*p, p);
- if (**p == ',') {
- size = memparse((*p) + 1, p);
-
- phys_initrd_start = start;
- phys_initrd_size = size;
- }
-}
-__early_param("initrd=", early_initrd);
-
static void __init arm_add_memory(unsigned long start, unsigned long size)
{
struct membank *bank;
@@ -503,17 +413,6 @@ static void __init early_mem(char **p)
__early_param("mem=", early_mem);
/*
- * vmalloc=size forces the vmalloc area to be exactly 'size'
- * bytes. This can be used to increase (or decrease) the vmalloc
- * area - the default is 128m.
- */
-static void __init early_vmalloc(char **arg)
-{
- vmalloc_reserve = memparse(*arg, arg);
-}
-__early_param("vmalloc=", early_vmalloc);
-
-/*
* Initial parsing of the command line.
*/
static void __init parse_cmdline(char **cmdline_p, char *from)
@@ -527,12 +426,12 @@ static void __init parse_cmdline(char **cmdline_p, char *from)
struct early_params *p;
for (p = &__early_begin; p < &__early_end; p++) {
- int len = strlen(p->arg);
+ int arglen = strlen(p->arg);
- if (memcmp(from, p->arg, len) == 0) {
+ if (memcmp(from, p->arg, arglen) == 0) {
if (to != command_line)
to -= 1;
- from += len;
+ from += arglen;
p->fn(&from);
while (*from != ' ' && *from != '\0')
@@ -579,18 +478,13 @@ request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
kernel_data.end = virt_to_phys(&_end - 1);
for (i = 0; i < mi->nr_banks; i++) {
- unsigned long virt_start, virt_end;
-
if (mi->bank[i].size == 0)
continue;
- virt_start = __phys_to_virt(mi->bank[i].start);
- virt_end = virt_start + mi->bank[i].size - 1;
-
res = alloc_bootmem_low(sizeof(*res));
res->name = "System RAM";
- res->start = __virt_to_phys(virt_start);
- res->end = __virt_to_phys(virt_end);
+ res->start = mi->bank[i].start;
+ res->end = mi->bank[i].start + mi->bank[i].size - 1;
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
request_resource(&iomem_resource, res);
@@ -694,26 +588,6 @@ static int __init parse_tag_ramdisk(const struct tag *tag)
__tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
-static int __init parse_tag_initrd(const struct tag *tag)
-{
- printk(KERN_WARNING "ATAG_INITRD is deprecated; "
- "please update your bootloader.\n");
- phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
- phys_initrd_size = tag->u.initrd.size;
- return 0;
-}
-
-__tagtable(ATAG_INITRD, parse_tag_initrd);
-
-static int __init parse_tag_initrd2(const struct tag *tag)
-{
- phys_initrd_start = tag->u.initrd.start;
- phys_initrd_size = tag->u.initrd.size;
- return 0;
-}
-
-__tagtable(ATAG_INITRD2, parse_tag_initrd2);
-
static int __init parse_tag_serialnr(const struct tag *tag)
{
system_serial_low = tag->u.serialnr.low;
@@ -901,28 +775,12 @@ static const char *hwcap_str[] = {
NULL
};
-static void
-c_show_cache(struct seq_file *m, const char *type, unsigned int cache)
-{
- unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
-
- seq_printf(m, "%s size\t\t: %d\n"
- "%s assoc\t\t: %d\n"
- "%s line length\t: %d\n"
- "%s sets\t\t: %d\n",
- type, mult << (8 + CACHE_SIZE(cache)),
- type, (mult << CACHE_ASSOC(cache)) >> 1,
- type, 8 << CACHE_LINE(cache),
- type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
- CACHE_LINE(cache)));
-}
-
static int c_show(struct seq_file *m, void *v)
{
int i;
seq_printf(m, "Processor\t: %s rev %d (%s)\n",
- cpu_name, (int)processor_id & 15, elf_platform);
+ cpu_name, read_cpuid_id() & 15, elf_platform);
#if defined(CONFIG_SMP)
for_each_online_cpu(i) {
@@ -949,47 +807,26 @@ static int c_show(struct seq_file *m, void *v)
if (elf_hwcap & (1 << i))
seq_printf(m, "%s ", hwcap_str[i]);
- seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24);
+ seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
- if ((processor_id & 0x0008f000) == 0x00000000) {
+ if ((read_cpuid_id() & 0x0008f000) == 0x00000000) {
/* pre-ARM7 */
- seq_printf(m, "CPU part\t: %07x\n", processor_id >> 4);
+ seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4);
} else {
- if ((processor_id & 0x0008f000) == 0x00007000) {
+ if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
/* ARM7 */
seq_printf(m, "CPU variant\t: 0x%02x\n",
- (processor_id >> 16) & 127);
+ (read_cpuid_id() >> 16) & 127);
} else {
/* post-ARM7 */
seq_printf(m, "CPU variant\t: 0x%x\n",
- (processor_id >> 20) & 15);
+ (read_cpuid_id() >> 20) & 15);
}
seq_printf(m, "CPU part\t: 0x%03x\n",
- (processor_id >> 4) & 0xfff);
- }
- seq_printf(m, "CPU revision\t: %d\n", processor_id & 15);
-
- {
- unsigned int cache_info = read_cpuid(CPUID_CACHETYPE);
- if (cache_info != processor_id) {
- seq_printf(m, "Cache type\t: %s\n"
- "Cache clean\t: %s\n"
- "Cache lockdown\t: %s\n"
- "Cache format\t: %s\n",
- cache_types[CACHE_TYPE(cache_info)],
- cache_clean[CACHE_TYPE(cache_info)],
- cache_lockdown[CACHE_TYPE(cache_info)],
- CACHE_S(cache_info) ? "Harvard" : "Unified");
-
- if (CACHE_S(cache_info)) {
- c_show_cache(m, "I", CACHE_ISIZE(cache_info));
- c_show_cache(m, "D", CACHE_DSIZE(cache_info));
- } else {
- c_show_cache(m, "Cache", CACHE_ISIZE(cache_info));
- }
- }
+ (read_cpuid_id() >> 4) & 0xfff);
}
+ seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
seq_puts(m, "\n");
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-26 04:52:31 +0300