diff options
Diffstat (limited to 'arch/sh/kernel/cpu/init.c')
| -rw-r--r-- | arch/sh/kernel/cpu/init.c | 125 |
1 files changed, 75 insertions, 50 deletions
diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c index 89b4b76c0d7..c736422344e 100644 --- a/arch/sh/kernel/cpu/init.c +++ b/arch/sh/kernel/cpu/init.c @@ -24,22 +24,32 @@ #include <asm/elf.h> #include <asm/io.h> #include <asm/smp.h> -#ifdef CONFIG_SUPERH32 -#include <asm/ubc.h> +#include <asm/sh_bios.h> + +#ifdef CONFIG_SH_FPU +#define cpu_has_fpu 1 +#else +#define cpu_has_fpu 0 +#endif + +#ifdef CONFIG_SH_DSP +#define cpu_has_dsp 1 +#else +#define cpu_has_dsp 0 #endif /* * Generic wrapper for command line arguments to disable on-chip * peripherals (nofpu, nodsp, and so forth). */ -#define onchip_setup(x) \ -static int x##_disabled __initdata = 0; \ - \ -static int __init x##_setup(char *opts) \ -{ \ - x##_disabled = 1; \ - return 1; \ -} \ +#define onchip_setup(x) \ +static int x##_disabled __initdata = !cpu_has_##x; \ + \ +static int __init x##_setup(char *opts) \ +{ \ + x##_disabled = 1; \ + return 1; \ +} \ __setup("no" __stringify(x), x##_setup); onchip_setup(fpu); @@ -52,10 +62,10 @@ onchip_setup(dsp); static void __init speculative_execution_init(void) { /* Clear RABD */ - ctrl_outl(ctrl_inl(CPUOPM) & ~CPUOPM_RABD, CPUOPM); + __raw_writel(__raw_readl(CPUOPM) & ~CPUOPM_RABD, CPUOPM); /* Flush the update */ - (void)ctrl_inl(CPUOPM); + (void)__raw_readl(CPUOPM); ctrl_barrier(); } #else @@ -89,7 +99,7 @@ static void __init expmask_init(void) #endif /* 2nd-level cache init */ -void __uses_jump_to_uncached __attribute__ ((weak)) l2_cache_init(void) +void __attribute__ ((weak)) l2_cache_init(void) { } @@ -97,12 +107,12 @@ void __uses_jump_to_uncached __attribute__ ((weak)) l2_cache_init(void) * Generic first-level cache init */ #ifdef CONFIG_SUPERH32 -static void __uses_jump_to_uncached cache_init(void) +static void cache_init(void) { unsigned long ccr, flags; jump_to_uncached(); - ccr = ctrl_inl(CCR); + ccr = __raw_readl(CCR); /* * At this point we don't know whether the cache is enabled or not - a @@ -146,7 +156,7 @@ static void __uses_jump_to_uncached cache_init(void) for (addr = addrstart; addr < addrstart + waysize; addr += current_cpu_data.dcache.linesz) - ctrl_outl(0, addr); + __raw_writel(0, addr); addrstart += current_cpu_data.dcache.way_incr; } while (--ways); @@ -179,7 +189,7 @@ static void __uses_jump_to_uncached cache_init(void) l2_cache_init(); - ctrl_outl(flags, CCR); + __raw_writel(flags, CCR); back_to_cached(); } #else @@ -207,6 +217,18 @@ static void detect_cache_shape(void) l2_cache_shape = -1; /* No S-cache */ } +static void __init fpu_init(void) +{ + /* Disable the FPU */ + if (fpu_disabled && (current_cpu_data.flags & CPU_HAS_FPU)) { + printk("FPU Disabled\n"); + current_cpu_data.flags &= ~CPU_HAS_FPU; + } + + disable_fpu(); + clear_used_math(); +} + #ifdef CONFIG_SH_DSP static void __init release_dsp(void) { @@ -244,28 +266,35 @@ static void __init dsp_init(void) if (sr & SR_DSP) current_cpu_data.flags |= CPU_HAS_DSP; + /* Disable the DSP */ + if (dsp_disabled && (current_cpu_data.flags & CPU_HAS_DSP)) { + printk("DSP Disabled\n"); + current_cpu_data.flags &= ~CPU_HAS_DSP; + } + /* Now that we've determined the DSP status, clear the DSP bit. */ release_dsp(); } +#else +static inline void __init dsp_init(void) { } #endif /* CONFIG_SH_DSP */ /** * sh_cpu_init * - * This is our initial entry point for each CPU, and is invoked on the boot - * CPU prior to calling start_kernel(). For SMP, a combination of this and - * start_secondary() will bring up each processor to a ready state prior - * to hand forking the idle loop. + * This is our initial entry point for each CPU, and is invoked on the + * boot CPU prior to calling start_kernel(). For SMP, a combination of + * this and start_secondary() will bring up each processor to a ready + * state prior to hand forking the idle loop. * - * We do all of the basic processor init here, including setting up the - * caches, FPU, DSP, kicking the UBC, etc. By the time start_kernel() is - * hit (and subsequently platform_setup()) things like determining the - * CPU subtype and initial configuration will all be done. + * We do all of the basic processor init here, including setting up + * the caches, FPU, DSP, etc. By the time start_kernel() is hit (and + * subsequently platform_setup()) things like determining the CPU + * subtype and initial configuration will all be done. * * Each processor family is still responsible for doing its own probing * and cache configuration in detect_cpu_and_cache_system(). */ - asmlinkage void __init sh_cpu_init(void) { current_thread_info()->cpu = hard_smp_processor_id(); @@ -302,18 +331,8 @@ asmlinkage void __init sh_cpu_init(void) detect_cache_shape(); } - /* Disable the FPU */ - if (fpu_disabled) { - printk("FPU Disabled\n"); - current_cpu_data.flags &= ~CPU_HAS_FPU; - } - - /* FPU initialization */ - disable_fpu(); - if ((current_cpu_data.flags & CPU_HAS_FPU)) { - current_thread_info()->status &= ~TS_USEDFPU; - clear_used_math(); - } + fpu_init(); + dsp_init(); /* * Initialize the per-CPU ASID cache very early, since the @@ -321,18 +340,24 @@ asmlinkage void __init sh_cpu_init(void) */ current_cpu_data.asid_cache = NO_CONTEXT; -#ifdef CONFIG_SH_DSP - /* Probe for DSP */ - dsp_init(); - - /* Disable the DSP */ - if (dsp_disabled) { - printk("DSP Disabled\n"); - current_cpu_data.flags &= ~CPU_HAS_DSP; - release_dsp(); - } -#endif - speculative_execution_init(); expmask_init(); + + /* Do the rest of the boot processor setup */ + if (raw_smp_processor_id() == 0) { + /* Save off the BIOS VBR, if there is one */ + sh_bios_vbr_init(); + + /* + * Setup VBR for boot CPU. Secondary CPUs do this through + * start_secondary(). + */ + per_cpu_trap_init(); + + /* + * Boot processor to setup the FP and extended state + * context info. + */ + init_thread_xstate(); + } } |