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[AVR32] Clean up cpu identification and add features bitmap 

Clean up the cpu identification code, using definitions from
<asm/sysreg.h> instead of hardcoded constants. Also, add a features
bitmap to struct avr32_cpuinfo to allow other code to make decisions
based upon what the running cpu is actually capable of.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Haavard Skinnemoen 2007-03-13 15:30:38 +01:00
parent 535c806c26
commit 3b328c9809
2 changed files with 53 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
arch/avr32/kernel/cpu.c
View File

@ -209,16 +209,17 @@ static const char *mmu_types[] = {
void __init setup_processor(void)
{
unsigned long config0, config1;
unsigned long features;
unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
unsigned tmp;
config0 = sysreg_read(CONFIG0); /* 0x0000013e; */
config1 = sysreg_read(CONFIG1); /* 0x01f689a2; */
cpu_id = config0 >> 24;
cpu_rev = (config0 >> 16) & 0xff;
arch_id = (config0 >> 13) & 0x07;
arch_rev = (config0 >> 10) & 0x07;
mmu_type = (config0 >> 7) & 0x03;
config0 = sysreg_read(CONFIG0);
config1 = sysreg_read(CONFIG1);
cpu_id = SYSREG_BFEXT(PROCESSORID, config0);
cpu_rev = SYSREG_BFEXT(PROCESSORREVISION, config0);
arch_id = SYSREG_BFEXT(AT, config0);
arch_rev = SYSREG_BFEXT(AR, config0);
mmu_type = SYSREG_BFEXT(MMUT, config0);
boot_cpu_data.arch_type = arch_id;
boot_cpu_data.cpu_type = cpu_id;
@ -226,16 +227,16 @@ void __init setup_processor(void)
boot_cpu_data.cpu_revision = cpu_rev;
boot_cpu_data.tlb_config = mmu_type;
tmp = (config1 >> 13) & 0x07;
tmp = SYSREG_BFEXT(ILSZ, config1);
if (tmp) {
boot_cpu_data.icache.ways = 1 << ((config1 >> 10) & 0x07);
boot_cpu_data.icache.sets = 1 << ((config1 >> 16) & 0x0f);
boot_cpu_data.icache.ways = 1 << SYSREG_BFEXT(IASS, config1);
boot_cpu_data.icache.sets = 1 << SYSREG_BFEXT(ISET, config1);
boot_cpu_data.icache.linesz = 1 << (tmp + 1);
}
tmp = (config1 >> 3) & 0x07;
tmp = SYSREG_BFEXT(DLSZ, config1);
if (tmp) {
boot_cpu_data.dcache.ways = 1 << (config1 & 0x07);
boot_cpu_data.dcache.sets = 1 << ((config1 >> 6) & 0x0f);
boot_cpu_data.dcache.ways = 1 << SYSREG_BFEXT(DASS, config1);
boot_cpu_data.dcache.sets = 1 << SYSREG_BFEXT(DSET, config1);
boot_cpu_data.dcache.linesz = 1 << (tmp + 1);
}
@ -250,16 +251,39 @@ void __init setup_processor(void)
cpu_names[cpu_id], cpu_id, cpu_rev,
arch_names[arch_id], arch_rev);
printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);
printk ("CPU: features:");
if (config0 & (1 << 6))
printk(" fpu");
if (config0 & (1 << 5))
printk(" java");
if (config0 & (1 << 4))
printk(" perfctr");
if (config0 & (1 << 3))
features = 0;
if (config0 & SYSREG_BIT(CONFIG0_R)) {
features |= AVR32_FEATURE_RMW;
printk(" rmw");
}
if (config0 & SYSREG_BIT(CONFIG0_D)) {
features |= AVR32_FEATURE_DSP;
printk(" dsp");
}
if (config0 & SYSREG_BIT(CONFIG0_S)) {
features |= AVR32_FEATURE_SIMD;
printk(" simd");
}
if (config0 & SYSREG_BIT(CONFIG0_O)) {
features |= AVR32_FEATURE_OCD;
printk(" ocd");
}
if (config0 & SYSREG_BIT(CONFIG0_P)) {
features |= AVR32_FEATURE_PCTR;
printk(" perfctr");
}
if (config0 & SYSREG_BIT(CONFIG0_J)) {
features |= AVR32_FEATURE_JAVA;
printk(" java");
}
if (config0 & SYSREG_BIT(CONFIG0_F)) {
features |= AVR32_FEATURE_FPU;
printk(" fpu");
}
printk("\n");
boot_cpu_data.features = features;
}
#ifdef CONFIG_PROC_FS

9
include/asm-avr32/processor.h
View File

@ -40,6 +40,14 @@ enum tlb_config {
TLB_INVALID
};
#define AVR32_FEATURE_RMW (1 << 0)
#define AVR32_FEATURE_DSP (1 << 1)
#define AVR32_FEATURE_SIMD (1 << 2)
#define AVR32_FEATURE_OCD (1 << 3)
#define AVR32_FEATURE_PCTR (1 << 4)
#define AVR32_FEATURE_JAVA (1 << 5)
#define AVR32_FEATURE_FPU (1 << 6)
struct avr32_cpuinfo {
struct clk *clk;
unsigned long loops_per_jiffy;
@ -48,6 +56,7 @@ struct avr32_cpuinfo {
unsigned short arch_revision;
unsigned short cpu_revision;
enum tlb_config tlb_config;
unsigned long features;
struct cache_info icache;
struct cache_info dcache;