* Processor capabilities determination functions.
*
* Copyright (C) xxxx the Anonymous
- * Copyright (C) 2003 Maciej W. Rozycki
+ * Copyright (C) 2003, 2004 Maciej W. Rozycki
* Copyright (C) 1994 - 2003 Ralf Baechle
- * Copyright (C) 2001 MIPS Inc.
+ * 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 inline void check_wait(void)
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;
}
}
-static inline void decode_config1(struct cpuinfo_mips *c)
+static inline unsigned int decode_config0(struct cpuinfo_mips *c)
{
- unsigned long config0 = read_c0_config();
- unsigned long config1;
+ unsigned int config0;
+ int isa;
- if ((config0 & (1 << 31)) == 0)
- return; /* actually wort a panic() */
+ config0 = read_c0_config();
+
+ if (((config0 & MIPS_CONF_MT) >> 7) == 1)
+ c->options |= MIPS_CPU_TLB;
+ isa = (config0 & MIPS_CONF_AT) >> 13;
+ switch (isa) {
+ case 0:
+ c->isa_level = MIPS_CPU_ISA_M32;
+ break;
+ case 2:
+ c->isa_level = MIPS_CPU_ISA_M64;
+ break;
+ default:
+ panic("Unsupported ISA type, cp0.config0.at: %d.", isa);
+ }
+
+ return config0 & MIPS_CONF_M;
+}
+
+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;
+
+ 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_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);
+ c->options |= MIPS_CPU_4KTLB;
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:
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;
static inline void cpu_probe_alchemy(struct cpuinfo_mips *c)
{
- decode_config1(c);
+ decode_configs(c);
+ c->options |= MIPS_CPU_4KTLB;
switch (c->processor_id & 0xff00) {
case PRID_IMP_AU1_REV1:
case PRID_IMP_AU1_REV2:
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);
+ c->options |= MIPS_CPU_4KTLB;
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
+#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
/* FPU in pass1 is known to have issues. */
- c->options |= MIPS_CPU_FPU | MIPS_CPU_32FPR;
+ c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR);
#endif
break;
}
static inline void cpu_probe_sandcraft(struct cpuinfo_mips *c)
{
- decode_config1(c);
+ decode_configs(c);
+ c->options |= MIPS_CPU_4KTLB;
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;
case PRID_COMP_SIBYTE:
cpu_probe_sibyte(c);
break;
-
case PRID_COMP_SANDCRAFT:
cpu_probe_sandcraft(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_M32 ||
+ c->isa_level == MIPS_CPU_ISA_M64) {
+ if (c->fpu_id & MIPS_FPIR_3D)
+ c->ases |= MIPS_ASE_MIPS3D;
+ }
+ }
}
__init void cpu_report(void)
projects / linux-2.6-block.git / blobdiff