Commit 0ba8b9b2 authored by Russell King's avatar Russell King Committed by Russell King

[ARM] cputype: separate definitions, use them

Add asm/cputype.h, moving functions and definitions from asm/system.h
there.  Convert all users of 'processor_id' to the more efficient
read_cpuid_id() function.
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent b8e6c91c
#ifndef __ASM_ARM_CPUTYPE_H
#define __ASM_ARM_CPUTYPE_H
#include <linux/stringify.h>
#define CPUID_ID 0
#define CPUID_CACHETYPE 1
#define CPUID_TCM 2
#define CPUID_TLBTYPE 3
#ifdef CONFIG_CPU_CP15
#define read_cpuid(reg) \
({ \
unsigned int __val; \
asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \
: "=r" (__val) \
: \
: "cc"); \
__val; \
})
#else
extern unsigned int processor_id;
#define read_cpuid(reg) (processor_id)
#endif
/*
* The CPU ID never changes at run time, so we might as well tell the
* compiler that it's constant. Use this function to read the CPU ID
* rather than directly reading processor_id or read_cpuid() directly.
*/
static inline unsigned int __attribute_const__ read_cpuid_id(void)
{
return read_cpuid(CPUID_ID);
}
static inline unsigned int __attribute_const__ read_cpuid_cachetype(void)
{
return read_cpuid(CPUID_CACHETYPE);
}
/*
* Intel's XScale3 core supports some v6 features (supersections, L2)
* but advertises itself as v5 as it does not support the v6 ISA. For
* this reason, we need a way to explicitly test for this type of CPU.
*/
#ifndef CONFIG_CPU_XSC3
#define cpu_is_xsc3() 0
#else
static inline int cpu_is_xsc3(void)
{
if ((read_cpuid_id() & 0xffffe000) == 0x69056000)
return 1;
return 0;
}
#endif
#if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3)
#define cpu_is_xscale() 0
#else
#define cpu_is_xscale() 1
#endif
#endif
......@@ -43,11 +43,6 @@
#define CR_XP (1 << 23) /* Extended page tables */
#define CR_VE (1 << 24) /* Vectored interrupts */
#define CPUID_ID 0
#define CPUID_CACHETYPE 1
#define CPUID_TCM 2
#define CPUID_TLBTYPE 3
/*
* This is used to ensure the compiler did actually allocate the register we
* asked it for some inline assembly sequences. Apparently we can't trust
......@@ -61,36 +56,8 @@
#ifndef __ASSEMBLY__
#include <linux/linkage.h>
#include <linux/stringify.h>
#include <linux/irqflags.h>
#ifdef CONFIG_CPU_CP15
#define read_cpuid(reg) \
({ \
unsigned int __val; \
asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \
: "=r" (__val) \
: \
: "cc"); \
__val; \
})
#else
extern unsigned int processor_id;
#define read_cpuid(reg) (processor_id)
#endif
/*
* The CPU ID never changes at run time, so we might as well tell the
* compiler that it's constant. Use this function to read the CPU ID
* rather than directly reading processor_id or read_cpuid() directly.
*/
static inline unsigned int read_cpuid_id(void) __attribute_const__;
static inline unsigned int read_cpuid_id(void)
{
return read_cpuid(CPUID_ID);
}
#define __exception __attribute__((section(".exception.text")))
struct thread_info;
......@@ -131,31 +98,6 @@ extern void cpu_init(void);
void arm_machine_restart(char mode);
extern void (*arm_pm_restart)(char str);
/*
* Intel's XScale3 core supports some v6 features (supersections, L2)
* but advertises itself as v5 as it does not support the v6 ISA. For
* this reason, we need a way to explicitly test for this type of CPU.
*/
#ifndef CONFIG_CPU_XSC3
#define cpu_is_xsc3() 0
#else
static inline int cpu_is_xsc3(void)
{
extern unsigned int processor_id;
if ((processor_id & 0xffffe000) == 0x69056000)
return 1;
return 0;
}
#endif
#if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3)
#define cpu_is_xscale() 0
#else
#define cpu_is_xscale() 1
#endif
#define UDBG_UNDEFINED (1 << 0)
#define UDBG_SYSCALL (1 << 1)
#define UDBG_BADABORT (1 << 2)
......
......@@ -26,6 +26,7 @@
#include <linux/fs.h>
#include <asm/cpu.h>
#include <asm/cputype.h>
#include <asm/elf.h>
#include <asm/procinfo.h>
#include <asm/setup.h>
......@@ -280,9 +281,9 @@ static inline void dump_cache(const char *prefix, int cpu, unsigned int cache)
static void __init dump_cpu_info(int cpu)
{
unsigned int info = read_cpuid(CPUID_CACHETYPE);
unsigned int info = read_cpuid_cachetype();
if (info != processor_id) {
if (info != read_cpuid_id()) {
printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT",
cache_types[CACHE_TYPE(info)]);
if (CACHE_S(info)) {
......@@ -301,15 +302,15 @@ 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
......@@ -346,10 +347,10 @@ 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 +370,7 @@ 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);
......@@ -922,7 +923,7 @@ 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) {
......@@ -949,30 +950,30 @@ 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);
(read_cpuid_id() >> 4) & 0xfff);
}
seq_printf(m, "CPU revision\t: %d\n", processor_id & 15);
seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
{
unsigned int cache_info = read_cpuid(CPUID_CACHETYPE);
if (cache_info != processor_id) {
unsigned int cache_info = read_cpuid_cachetype();
if (cache_info != read_cpuid_id()) {
seq_printf(m, "Cache type\t: %s\n"
"Cache clean\t: %s\n"
"Cache lockdown\t: %s\n"
......
......@@ -27,6 +27,7 @@
#include <linux/mtd/physmap.h>
#include <linux/platform_device.h>
#include <mach/hardware.h>
#include <asm/cputype.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach/arch.h>
......@@ -49,8 +50,7 @@ static int force_ep80219;
static int is_80219(void)
{
extern int processor_id;
return !!((processor_id & 0xffffffe0) == 0x69052e20);
return !!((read_cpuid_id() & 0xffffffe0) == 0x69052e20);
}
static int is_ep80219(void)
......
......@@ -27,6 +27,7 @@
#include <linux/device.h>
#include <asm/dma-mapping.h>
#include <asm/cputype.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/sizes.h>
......@@ -366,15 +367,13 @@ void __init ixp4xx_adjust_zones(int node, unsigned long *zone_size,
void __init ixp4xx_pci_preinit(void)
{
unsigned long processor_id;
asm("mrc p15, 0, %0, cr0, cr0, 0;" : "=r"(processor_id) :);
unsigned long cpuid = read_cpuid_id();
/*
* Determine which PCI read method to use.
* Rev 0 IXP425 requires workaround.
*/
if (!(processor_id & 0xf) && cpu_is_ixp42x()) {
if (!(cpuid & 0xf) && cpu_is_ixp42x()) {
printk("PCI: IXP42x A0 silicon detected - "
"PCI Non-Prefetch Workaround Enabled\n");
ixp4xx_pci_read = ixp4xx_pci_read_errata;
......
......@@ -14,18 +14,19 @@
#ifndef __ASM_ARCH_CPU_H__
#define __ASM_ARCH_CPU_H__
extern unsigned int processor_id;
#include <asm/cputype.h>
/* Processor id value in CP15 Register 0 */
#define IXP425_PROCESSOR_ID_VALUE 0x690541c0
#define IXP435_PROCESSOR_ID_VALUE 0x69054040
#define IXP465_PROCESSOR_ID_VALUE 0x69054200
#define IXP4XX_PROCESSOR_ID_MASK 0xfffffff0
#define cpu_is_ixp42x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \
#define cpu_is_ixp42x() ((read_cpuid_id() & IXP4XX_PROCESSOR_ID_MASK) == \
IXP425_PROCESSOR_ID_VALUE)
#define cpu_is_ixp43x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \
#define cpu_is_ixp43x() ((read_cpuid_id() & IXP4XX_PROCESSOR_ID_MASK) == \
IXP435_PROCESSOR_ID_VALUE)
#define cpu_is_ixp46x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \
#define cpu_is_ixp46x() ((read_cpuid_id() & IXP4XX_PROCESSOR_ID_MASK) == \
IXP465_PROCESSOR_ID_VALUE)
static inline u32 ixp4xx_read_feature_bits(void)
......
......@@ -15,6 +15,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/cputype.h>
#include <asm/io.h>
#include <mach/control.h>
......
......@@ -62,6 +62,8 @@
#ifndef __ASSEMBLY__
#include <asm/cputype.h>
#ifdef CONFIG_PXA25x
#define __cpu_is_pxa21x(id) \
({ \
......
......@@ -88,6 +88,8 @@
#include <linux/init.h>
#include <linux/cpufreq.h>
#include <asm/cputype.h>
#include <mach/hardware.h>
#include "generic.h"
......@@ -240,7 +242,7 @@ static struct cpufreq_driver sa1100_driver = {
static int __init sa1100_dram_init(void)
{
if ((processor_id & CPU_SA1100_MASK) == CPU_SA1100_ID)
if (cpu_is_sa1100())
return cpufreq_register_driver(&sa1100_driver);
else
return -ENODEV;
......
......@@ -25,6 +25,7 @@
#include <linux/init.h>
#include <mach/hardware.h>
#include <asm/cputype.h>
#include <asm/mach-types.h>
#include <asm/io.h>
#include <asm/system.h>
......
......@@ -2054,19 +2054,3 @@
/* active display mode) */
#define LCCR3_OutEnH (LCCR3_OEP*0) /* Output Enable active High */
#define LCCR3_OutEnL (LCCR3_OEP*1) /* Output Enable active Low */
#ifndef __ASSEMBLY__
extern unsigned int processor_id;
#endif
#define CPU_REVISION (processor_id & 15)
#define CPU_SA1110_A0 (0)
#define CPU_SA1110_B0 (4)
#define CPU_SA1110_B1 (5)
#define CPU_SA1110_B2 (6)
#define CPU_SA1110_B4 (8)
#define CPU_SA1100_ID (0x4401a110)
#define CPU_SA1100_MASK (0xfffffff0)
#define CPU_SA1110_ID (0x6901b110)
#define CPU_SA1110_MASK (0xfffffff0)
......@@ -36,8 +36,26 @@
#define io_v2p( x ) \
( (((x)&0x00ffffff) | (((x)&(0x30000000>>VIO_SHIFT))<<VIO_SHIFT)) + PIO_START )
#define CPU_SA1110_A0 (0)
#define CPU_SA1110_B0 (4)
#define CPU_SA1110_B1 (5)
#define CPU_SA1110_B2 (6)
#define CPU_SA1110_B4 (8)
#define CPU_SA1100_ID (0x4401a110)
#define CPU_SA1100_MASK (0xfffffff0)
#define CPU_SA1110_ID (0x6901b110)
#define CPU_SA1110_MASK (0xfffffff0)
#ifndef __ASSEMBLY__
#include <asm/cputype.h>
#define CPU_REVISION (read_cpuid_id() & 15)
#define cpu_is_sa1100() ((read_cpuid_id() & CPU_SA1100_MASK) == CPU_SA1100_ID)
#define cpu_is_sa1110() ((read_cpuid_id() & CPU_SA1110_MASK) == CPU_SA1110_ID)
# define __REG(x) (*((volatile unsigned long *)io_p2v(x)))
# define __PREG(x) (io_v2p((unsigned long)&(x)))
......
......@@ -18,10 +18,11 @@
*/
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <asm/system.h>
#include <asm/cputype.h>
#include <asm/cacheflush.h>
#include <asm/io.h>
#define CR_L2 (1 << 26)
......
......@@ -25,6 +25,7 @@
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <asm/cputype.h>
#include <asm/cacheflush.h>
#include <asm/io.h>
#include <asm/mmu_context.h>
......
......@@ -6,6 +6,7 @@
#include <linux/mman.h>
#include <linux/shm.h>
#include <linux/sched.h>
#include <asm/cputype.h>
#include <asm/system.h>
#define COLOUR_ALIGN(addr,pgoff) \
......@@ -37,8 +38,8 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
* caches alias. This is indicated by bits 9 and 21 of the
* cache type register.
*/
cache_type = read_cpuid(CPUID_CACHETYPE);
if (cache_type != read_cpuid(CPUID_ID)) {
cache_type = read_cpuid_cachetype();
if (cache_type != read_cpuid_id()) {
aliasing = (cache_type | cache_type >> 12) & (1 << 11);
if (aliasing)
do_align = filp || flags & MAP_SHARED;
......
......@@ -15,6 +15,7 @@
#include <linux/mman.h>
#include <linux/nodemask.h>
#include <asm/cputype.h>
#include <asm/mach-types.h>
#include <asm/setup.h>
#include <asm/sizes.h>
......
......@@ -22,7 +22,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <asm/system.h>
#include <asm/cputype.h>
#include "op_counter.h"
#include "op_arm_model.h"
......
......@@ -174,10 +174,8 @@ static struct miscdevice ixp4xx_wdt_miscdev = {
static int __init ixp4xx_wdt_init(void)
{
int ret;
unsigned long processor_id;
asm("mrc p15, 0, %0, cr0, cr0, 0;" : "=r"(processor_id) :);
if (!(processor_id & 0xf) && !cpu_is_ixp46x()) {
if (!(read_cpuid_id() & 0xf) && !cpu_is_ixp46x()) {
printk(KERN_ERR "IXP4XXX Watchdog: Rev. A0 IXP42x CPU detected"
" - watchdog disabled\n");
......
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