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[ARM] 3234/1: Update cpu_architecture() to deal with the new ID format 

Patch from Catalin Marinas

Since ARM1176, the CPU ID format has changed and it will also be used for
future ARM architectures.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
hifive-unleashed-5.1
Catalin Marinas 2006-01-12 16:28:16 +00:00 committed by Russell King
parent 37134cd55d
commit 6b090a25fe
1 changed files with 9 additions and 6 deletions
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15
arch/arm/kernel/setup.c
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@ -205,7 +205,7 @@ static const char *proc_arch[] = {
"5TE",
"5TEJ",
"6TEJ",
"?(10)",
"7",
"?(11)",
"?(12)",
"?(13)",
@ -258,14 +258,17 @@ int cpu_architecture(void)
{
int cpu_arch;
if ((processor_id & 0x0000f000) == 0) {
if ((processor_id & 0x0008f000) == 0) {
cpu_arch = CPU_ARCH_UNKNOWN;
} else if ((processor_id & 0x0000f000) == 0x00007000) {
} else if ((processor_id & 0x0008f000) == 0x00007000) {
cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
} else {
} else if ((processor_id & 0x00080000) == 0x00000000) {
cpu_arch = (processor_id >> 16) & 7;
if (cpu_arch)
cpu_arch += CPU_ARCH_ARMv3;
} else {
/* the revised CPUID */
cpu_arch = ((processor_id >> 12) & 0xf) - 0xb + CPU_ARCH_ARMv6;
}
return cpu_arch;
@ -863,11 +866,11 @@ static int c_show(struct seq_file *m, void *v)
seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24);
seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
if ((processor_id & 0x0000f000) == 0x00000000) {
if ((processor_id & 0x0008f000) == 0x00000000) {
/* pre-ARM7 */
seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4);
} else {
if ((processor_id & 0x0000f000) == 0x00007000) {
if ((processor_id & 0x0008f000) == 0x00007000) {
/* ARM7 */
seq_printf(m, "CPU variant\t: 0x%02x\n",
(processor_id >> 16) & 127);