* Processor capabilities determination functions.
*
* Copyright (C) xxxx the Anonymous
- * Copyright (C) 2003 Maciej W. Rozycki
- * Copyright (C) 1994 - 2003 Ralf Baechle
- * Copyright (C) 2001 MIPS Inc.
+ * Copyright (C) 1994 - 2006 Ralf Baechle
+ * Copyright (C) 2003, 2004 Maciej W. Rozycki
+ * Copyright (C) 2001, 2004 MIPS Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
#include <linux/ptrace.h>
#include <linux/stddef.h>
-#include <asm/bugs.h>
#include <asm/cpu.h>
#include <asm/fpu.h>
#include <asm/mipsregs.h>
".set\tmips0");
}
-/*
- * The Au1xxx wait is available only if we run CONFIG_PM and
- * the timer setup found we had a 32KHz counter available.
- * There are still problems with functions that may call au1k_wait
- * directly, but that will be discovered pretty quickly.
- */
-extern void (*au1k_wait_ptr)(void);
+/* The Au1xxx wait is available only if using 32khz counter or
+ * external timer source, but specifically not CP0 Counter. */
+int allow_au1k_wait;
-void au1k_wait(void)
+static void au1k_wait(void)
{
-#ifdef CONFIG_PM
/* using the wait instruction makes CP0 counter unusable */
- __asm__(".set\tmips3\n\t"
+ __asm__(".set mips3\n\t"
+ "cache 0x14, 0(%0)\n\t"
+ "cache 0x14, 32(%0)\n\t"
+ "sync\n\t"
+ "nop\n\t"
"wait\n\t"
"nop\n\t"
"nop\n\t"
"nop\n\t"
"nop\n\t"
- ".set\tmips0");
-#else
- __asm__("nop\n\t"
- "nop");
-#endif
+ ".set mips0\n\t"
+ : : "r" (au1k_wait));
}
+static int __initdata nowait = 0;
+
+int __init wait_disable(char *s)
+{
+ nowait = 1;
+
+ return 1;
+}
+
+__setup("nowait", wait_disable);
+
static inline void check_wait(void)
{
struct cpuinfo_mips *c = ¤t_cpu_data;
printk("Checking for 'wait' instruction... ");
+ if (nowait) {
+ printk (" disabled.\n");
+ return;
+ }
+
switch (c->cputype) {
case CPU_R3081:
case CPU_R3081E:
/* case CPU_20KC:*/
case CPU_24K:
case CPU_25KF:
+ case CPU_34K:
+ case CPU_74K:
+ case CPU_PR4450:
cpu_wait = r4k_wait;
printk(" available.\n");
break;
-#ifdef CONFIG_PM
case CPU_AU1000:
case CPU_AU1100:
case CPU_AU1500:
- if (au1k_wait_ptr != NULL) {
- cpu_wait = au1k_wait_ptr;
+ case CPU_AU1550:
+ case CPU_AU1200:
+ if (allow_au1k_wait) {
+ cpu_wait = au1k_wait;
printk(" available.\n");
- }
- else {
+ } else
printk(" unavailable.\n");
- }
break;
-#endif
default:
printk(" unavailable.\n");
break;
return ((cpu_get_fpu_id() & 0xff00) != FPIR_IMP_NONE);
}
-#define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4KTLB \
+#define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \
| MIPS_CPU_COUNTER)
static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
case PRID_IMP_R2000:
c->cputype = CPU_R2000;
c->isa_level = MIPS_CPU_ISA_I;
- c->options = MIPS_CPU_TLB | MIPS_CPU_NOFPUEX;
+ c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE |
+ MIPS_CPU_NOFPUEX;
if (__cpu_has_fpu())
c->options |= MIPS_CPU_FPU;
c->tlbsize = 64;
else
c->cputype = CPU_R3000;
c->isa_level = MIPS_CPU_ISA_I;
- c->options = MIPS_CPU_TLB | MIPS_CPU_NOFPUEX;
+ c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE |
+ MIPS_CPU_NOFPUEX;
if (__cpu_has_fpu())
c->options |= MIPS_CPU_FPU;
c->tlbsize = 64;
break;
case PRID_IMP_VR41XX:
switch (c->processor_id & 0xf0) {
-#ifndef CONFIG_VR4181
case PRID_REV_VR4111:
c->cputype = CPU_VR4111;
break;
-#else
- case PRID_REV_VR4181:
- c->cputype = CPU_VR4181;
- break;
-#endif
case PRID_REV_VR4121:
c->cputype = CPU_VR4121;
break;
case PRID_IMP_R4600:
c->cputype = CPU_R4600;
c->isa_level = MIPS_CPU_ISA_III;
- c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_LLSC;
+ c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_32FPR |
+ MIPS_CPU_LLSC;
c->tlbsize = 48;
break;
#if 0
* for documentation. Commented out because it shares
* it's c0_prid id number with the TX3900.
*/
- c->cputype = CPU_R4650;
+ c->cputype = CPU_R4650;
c->isa_level = MIPS_CPU_ISA_III;
c->options = R4K_OPTS | MIPS_CPU_FPU | MIPS_CPU_LLSC;
c->tlbsize = 48;
#endif
case PRID_IMP_TX39:
c->isa_level = MIPS_CPU_ISA_I;
- c->options = MIPS_CPU_TLB;
+ c->options = MIPS_CPU_TLB | MIPS_CPU_TX39_CACHE;
if ((c->processor_id & 0xf0) == (PRID_REV_TX3927 & 0xf0)) {
c->cputype = CPU_TX3927;
case PRID_IMP_R10000:
c->cputype = CPU_R10000;
c->isa_level = MIPS_CPU_ISA_IV;
- c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX |
+ c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX |
MIPS_CPU_FPU | MIPS_CPU_32FPR |
MIPS_CPU_COUNTER | MIPS_CPU_WATCH |
MIPS_CPU_LLSC;
case PRID_IMP_R12000:
c->cputype = CPU_R12000;
c->isa_level = MIPS_CPU_ISA_IV;
- c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX |
+ c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX |
+ MIPS_CPU_FPU | MIPS_CPU_32FPR |
+ MIPS_CPU_COUNTER | MIPS_CPU_WATCH |
+ MIPS_CPU_LLSC;
+ c->tlbsize = 64;
+ break;
+ case PRID_IMP_R14000:
+ c->cputype = CPU_R14000;
+ c->isa_level = MIPS_CPU_ISA_IV;
+ c->options = MIPS_CPU_TLB | MIPS_CPU_4K_CACHE | MIPS_CPU_4KEX |
MIPS_CPU_FPU | MIPS_CPU_32FPR |
MIPS_CPU_COUNTER | MIPS_CPU_WATCH |
MIPS_CPU_LLSC;
}
}
-static inline void decode_config1(struct cpuinfo_mips *c)
+static char unknown_isa[] __initdata = KERN_ERR \
+ "Unsupported ISA type, c0.config0: %d.";
+
+static inline unsigned int decode_config0(struct cpuinfo_mips *c)
{
- unsigned long config0 = read_c0_config();
- unsigned long config1;
+ unsigned int config0;
+ int isa;
+
+ config0 = read_c0_config();
- if ((config0 & (1 << 31)) == 0)
- return; /* actually wort a panic() */
+ if (((config0 & MIPS_CONF_MT) >> 7) == 1)
+ c->options |= MIPS_CPU_TLB;
+ isa = (config0 & MIPS_CONF_AT) >> 13;
+ switch (isa) {
+ case 0:
+ switch ((config0 >> 10) & 7) {
+ case 0:
+ c->isa_level = MIPS_CPU_ISA_M32R1;
+ break;
+ case 1:
+ c->isa_level = MIPS_CPU_ISA_M32R2;
+ break;
+ default:
+ goto unknown;
+ }
+ break;
+ case 2:
+ switch ((config0 >> 10) & 7) {
+ case 0:
+ c->isa_level = MIPS_CPU_ISA_M64R1;
+ break;
+ case 1:
+ c->isa_level = MIPS_CPU_ISA_M64R2;
+ break;
+ default:
+ goto unknown;
+ }
+ break;
+ default:
+ goto unknown;
+ }
+
+ return config0 & MIPS_CONF_M;
+
+unknown:
+ panic(unknown_isa, config0);
+}
+
+static inline unsigned int decode_config1(struct cpuinfo_mips *c)
+{
+ unsigned int config1;
- /* MIPS32 or MIPS64 compliant CPU. Read Config 1 register. */
- c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX |
- MIPS_CPU_4KTLB | MIPS_CPU_COUNTER | MIPS_CPU_DIVEC |
- MIPS_CPU_LLSC | MIPS_CPU_MCHECK;
config1 = read_c0_config1();
- if (config1 & (1 << 3))
+
+ if (config1 & MIPS_CONF1_MD)
+ c->ases |= MIPS_ASE_MDMX;
+ if (config1 & MIPS_CONF1_WR)
c->options |= MIPS_CPU_WATCH;
- if (config1 & (1 << 2))
- c->options |= MIPS_CPU_MIPS16;
- if (config1 & (1 << 1))
+ if (config1 & MIPS_CONF1_CA)
+ c->ases |= MIPS_ASE_MIPS16;
+ if (config1 & MIPS_CONF1_EP)
c->options |= MIPS_CPU_EJTAG;
- if (config1 & 1) {
+ if (config1 & MIPS_CONF1_FP) {
c->options |= MIPS_CPU_FPU;
c->options |= MIPS_CPU_32FPR;
}
+ if (cpu_has_tlb)
+ c->tlbsize = ((config1 & MIPS_CONF1_TLBS) >> 25) + 1;
+
+ return config1 & MIPS_CONF_M;
+}
+
+static inline unsigned int decode_config2(struct cpuinfo_mips *c)
+{
+ unsigned int config2;
+
+ config2 = read_c0_config2();
+
+ if (config2 & MIPS_CONF2_SL)
+ c->scache.flags &= ~MIPS_CACHE_NOT_PRESENT;
+
+ return config2 & MIPS_CONF_M;
+}
+
+static inline unsigned int decode_config3(struct cpuinfo_mips *c)
+{
+ unsigned int config3;
+
+ config3 = read_c0_config3();
+
+ if (config3 & MIPS_CONF3_SM)
+ c->ases |= MIPS_ASE_SMARTMIPS;
+ if (config3 & MIPS_CONF3_DSP)
+ c->ases |= MIPS_ASE_DSP;
+ if (config3 & MIPS_CONF3_VINT)
+ c->options |= MIPS_CPU_VINT;
+ if (config3 & MIPS_CONF3_VEIC)
+ c->options |= MIPS_CPU_VEIC;
+ if (config3 & MIPS_CONF3_MT)
+ c->ases |= MIPS_ASE_MIPSMT;
+
+ return config3 & MIPS_CONF_M;
+}
+
+static inline void decode_configs(struct cpuinfo_mips *c)
+{
+ /* MIPS32 or MIPS64 compliant CPU. */
+ c->options = MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE | MIPS_CPU_COUNTER |
+ MIPS_CPU_DIVEC | MIPS_CPU_LLSC | MIPS_CPU_MCHECK;
+
c->scache.flags = MIPS_CACHE_NOT_PRESENT;
- c->tlbsize = ((config1 >> 25) & 0x3f) + 1;
+ /* Read Config registers. */
+ if (!decode_config0(c))
+ return; /* actually worth a panic() */
+ if (!decode_config1(c))
+ return;
+ if (!decode_config2(c))
+ return;
+ if (!decode_config3(c))
+ return;
}
static inline void cpu_probe_mips(struct cpuinfo_mips *c)
{
- decode_config1(c);
+ decode_configs(c);
switch (c->processor_id & 0xff00) {
case PRID_IMP_4KC:
c->cputype = CPU_4KC;
- c->isa_level = MIPS_CPU_ISA_M32;
break;
case PRID_IMP_4KEC:
c->cputype = CPU_4KEC;
- c->isa_level = MIPS_CPU_ISA_M32;
+ break;
+ case PRID_IMP_4KECR2:
+ c->cputype = CPU_4KEC;
break;
case PRID_IMP_4KSC:
+ case PRID_IMP_4KSD:
c->cputype = CPU_4KSC;
- c->isa_level = MIPS_CPU_ISA_M32;
break;
case PRID_IMP_5KC:
c->cputype = CPU_5KC;
- c->isa_level = MIPS_CPU_ISA_M64;
break;
case PRID_IMP_20KC:
c->cputype = CPU_20KC;
- c->isa_level = MIPS_CPU_ISA_M64;
break;
case PRID_IMP_24K:
+ case PRID_IMP_24KE:
c->cputype = CPU_24K;
- c->isa_level = MIPS_CPU_ISA_M32;
break;
case PRID_IMP_25KF:
c->cputype = CPU_25KF;
- c->isa_level = MIPS_CPU_ISA_M64;
/* Probe for L2 cache */
c->scache.flags &= ~MIPS_CACHE_NOT_PRESENT;
break;
+ case PRID_IMP_34K:
+ c->cputype = CPU_34K;
+ break;
+ case PRID_IMP_74K:
+ c->cputype = CPU_74K;
+ break;
}
}
static inline void cpu_probe_alchemy(struct cpuinfo_mips *c)
{
- decode_config1(c);
+ decode_configs(c);
switch (c->processor_id & 0xff00) {
case PRID_IMP_AU1_REV1:
case PRID_IMP_AU1_REV2:
switch ((c->processor_id >> 24) & 0xff) {
case 0:
- c->cputype = CPU_AU1000;
+ c->cputype = CPU_AU1000;
break;
case 1:
c->cputype = CPU_AU1500;
case 3:
c->cputype = CPU_AU1550;
break;
+ case 4:
+ c->cputype = CPU_AU1200;
+ break;
default:
panic("Unknown Au Core!");
break;
}
- c->isa_level = MIPS_CPU_ISA_M32;
break;
}
}
static inline void cpu_probe_sibyte(struct cpuinfo_mips *c)
{
- decode_config1(c);
+ decode_configs(c);
+
+ /*
+ * For historical reasons the SB1 comes with it's own variant of
+ * cache code which eventually will be folded into c-r4k.c. Until
+ * then we pretend it's got it's own cache architecture.
+ */
+ c->options &= ~MIPS_CPU_4K_CACHE;
+ c->options |= MIPS_CPU_SB1_CACHE;
+
switch (c->processor_id & 0xff00) {
case PRID_IMP_SB1:
c->cputype = CPU_SB1;
- c->isa_level = MIPS_CPU_ISA_M64;
- c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX |
- MIPS_CPU_COUNTER | MIPS_CPU_DIVEC |
- MIPS_CPU_MCHECK | MIPS_CPU_EJTAG |
- MIPS_CPU_WATCH | MIPS_CPU_LLSC;
-#ifndef CONFIG_SB1_PASS_1_WORKAROUNDS
/* FPU in pass1 is known to have issues. */
- c->options |= MIPS_CPU_FPU | MIPS_CPU_32FPR;
-#endif
+ if ((c->processor_id & 0xff) < 0x02)
+ c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR);
+ break;
+ case PRID_IMP_SB1A:
+ c->cputype = CPU_SB1A;
break;
}
}
static inline void cpu_probe_sandcraft(struct cpuinfo_mips *c)
{
- decode_config1(c);
+ decode_configs(c);
switch (c->processor_id & 0xff00) {
case PRID_IMP_SR71000:
c->cputype = CPU_SR71000;
- c->isa_level = MIPS_CPU_ISA_M64;
- c->options = MIPS_CPU_TLB | MIPS_CPU_4KEX |
- MIPS_CPU_4KTLB | MIPS_CPU_FPU |
- MIPS_CPU_COUNTER | MIPS_CPU_MCHECK;
c->scache.ways = 8;
c->tlbsize = 64;
break;
}
}
+static inline void cpu_probe_philips(struct cpuinfo_mips *c)
+{
+ decode_configs(c);
+ switch (c->processor_id & 0xff00) {
+ case PRID_IMP_PR4450:
+ c->cputype = CPU_PR4450;
+ c->isa_level = MIPS_CPU_ISA_M32R1;
+ break;
+ default:
+ panic("Unknown Philips Core!"); /* REVISIT: die? */
+ break;
+ }
+}
+
+
__init void cpu_probe(void)
{
struct cpuinfo_mips *c = ¤t_cpu_data;
case PRID_COMP_SIBYTE:
cpu_probe_sibyte(c);
break;
-
case PRID_COMP_SANDCRAFT:
cpu_probe_sandcraft(c);
break;
+ case PRID_COMP_PHILIPS:
+ cpu_probe_philips(c);
+ break;
default:
c->cputype = CPU_UNKNOWN;
}
- if (c->options & MIPS_CPU_FPU)
+ if (c->options & MIPS_CPU_FPU) {
c->fpu_id = cpu_get_fpu_id();
+
+ if (c->isa_level == MIPS_CPU_ISA_M32R1 ||
+ c->isa_level == MIPS_CPU_ISA_M32R2 ||
+ c->isa_level == MIPS_CPU_ISA_M64R1 ||
+ c->isa_level == MIPS_CPU_ISA_M64R2) {
+ if (c->fpu_id & MIPS_FPIR_3D)
+ c->ases |= MIPS_ASE_MIPS3D;
+ }
+ }
}
__init void cpu_report(void)
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