diff options
| -rw-r--r-- | arch/arm/mach-omap2/id.c | 52 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/control.h | 34 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/cpu.h | 25 |
3 files changed, 108 insertions, 3 deletions
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c index d28e6fe..d7ac8d5 100644 --- a/arch/arm/mach-omap2/id.c +++ b/arch/arm/mach-omap2/id.c @@ -28,6 +28,7 @@ static struct omap_chip_id omap_chip; static unsigned int omap_revision; +u32 omap3_features; unsigned int omap_rev(void) { @@ -155,7 +156,33 @@ void __init omap24xx_check_revision(void) pr_info("\n"); } -void __init omap34xx_check_revision(void) +#define OMAP3_CHECK_FEATURE(status,feat) \ + if (((status & OMAP3_ ##feat## _MASK) \ + >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) { \ + omap3_features |= OMAP3_HAS_ ##feat; \ + } + +void __init omap3_check_features(void) +{ + u32 status; + + omap3_features = 0; + + status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS); + + OMAP3_CHECK_FEATURE(status, L2CACHE); + OMAP3_CHECK_FEATURE(status, IVA); + OMAP3_CHECK_FEATURE(status, SGX); + OMAP3_CHECK_FEATURE(status, NEON); + OMAP3_CHECK_FEATURE(status, ISP); + + /* + * TODO: Get additional info (where applicable) + * e.g. Size of L2 cache. + */ +} + +void __init omap3_check_revision(void) { u32 cpuid, idcode; u16 hawkeye; @@ -212,6 +239,22 @@ out: pr_info("OMAP%04x %s\n", omap_rev() >> 16, rev_name); } +#define OMAP3_SHOW_FEATURE(feat) \ + if (omap3_has_ ##feat()) { \ + pr_info (" - "#feat" : Y"); \ + } else { \ + pr_info (" - "#feat" : N"); \ + } + +void __init omap3_cpuinfo(void) +{ + OMAP3_SHOW_FEATURE(l2cache); + OMAP3_SHOW_FEATURE(iva); + OMAP3_SHOW_FEATURE(sgx); + OMAP3_SHOW_FEATURE(neon); + OMAP3_SHOW_FEATURE(isp); +} + /* * Try to detect the exact revision of the omap we're running on */ @@ -223,8 +266,11 @@ void __init omap2_check_revision(void) */ if (cpu_is_omap24xx()) omap24xx_check_revision(); - else if (cpu_is_omap34xx()) - omap34xx_check_revision(); + else if (cpu_is_omap34xx()) { + omap3_check_features(); + omap3_check_revision(); + omap3_cpuinfo(); + } else if (cpu_is_omap44xx()) { printk(KERN_INFO "FIXME: CPU revision = OMAP4430\n"); return; diff --git a/arch/arm/plat-omap/include/plat/control.h b/arch/arm/plat-omap/include/plat/control.h index 8237cb9..79985e4 100644 --- a/arch/arm/plat-omap/include/plat/control.h +++ b/arch/arm/plat-omap/include/plat/control.h @@ -254,6 +254,40 @@ #define OMAP343X_SCRATCHPAD (OMAP343X_CTRL_BASE + 0x910) #define OMAP343X_SCRATCHPAD_ROM_OFFSET 0x19C +/* + * CONTROL OMAP STATUS register to identify OMAP3 features + */ +#define OMAP3_CONTROL_OMAP_STATUS 0x044c + +#define OMAP3_SGX_SHIFT 13 +#define OMAP3_SGX_MASK (3 << OMAP3_SGX_SHIFT) +#define FEAT_SGX_FULL 0 +#define FEAT_SGX_HALF 1 +#define FEAT_SGX_NONE 2 + +#define OMAP3_IVA_SHIFT 12 +#define OMAP3_IVA_MASK (1 << OMAP3_SGX_SHIFT) +#define FEAT_IVA 0 +#define FEAT_IVA_NONE 1 + +#define OMAP3_L2CACHE_SHIFT 10 +#define OMAP3_L2CACHE_MASK (3 << OMAP3_L2CACHE_SHIFT) +#define FEAT_L2CACHE_NONE 0 +#define FEAT_L2CACHE_64KB 1 +#define FEAT_L2CACHE_128KB 2 +#define FEAT_L2CACHE_256KB 3 + +#define OMAP3_ISP_SHIFT 5 +#define OMAP3_ISP_MASK (1<< OMAP3_ISP_SHIFT) +#define FEAT_ISP 0 +#define FEAT_ISP_NONE 1 + +#define OMAP3_NEON_SHIFT 4 +#define OMAP3_NEON_MASK (1<< OMAP3_NEON_SHIFT) +#define FEAT_NEON 0 +#define FEAT_NEON_NONE 1 + + #ifndef __ASSEMBLY__ #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \ defined(CONFIG_ARCH_OMAP4) diff --git a/arch/arm/plat-omap/include/plat/cpu.h b/arch/arm/plat-omap/include/plat/cpu.h index f129efb..431fec4 100644 --- a/arch/arm/plat-omap/include/plat/cpu.h +++ b/arch/arm/plat-omap/include/plat/cpu.h @@ -30,6 +30,8 @@ #ifndef __ASM_ARCH_OMAP_CPU_H #define __ASM_ARCH_OMAP_CPU_H +#include <linux/bitops.h> + /* * Omap device type i.e. EMU/HS/TST/GP/BAD */ @@ -423,4 +425,27 @@ IS_OMAP_TYPE(3430, 0x3430) int omap_chip_is(struct omap_chip_id oci); void omap2_check_revision(void); +/* + * Runtime detection of OMAP3 features + */ +extern u32 omap3_features; + +#define OMAP3_HAS_L2CACHE BIT(0) +#define OMAP3_HAS_IVA BIT(1) +#define OMAP3_HAS_SGX BIT(2) +#define OMAP3_HAS_NEON BIT(3) +#define OMAP3_HAS_ISP BIT(4) + +#define OMAP3_HAS_FEATURE(feat,flag) \ +static inline unsigned int omap3_has_ ##feat(void) \ +{ \ + return (omap3_features & OMAP3_HAS_ ##flag); \ +} \ + +OMAP3_HAS_FEATURE(l2cache, L2CACHE) +OMAP3_HAS_FEATURE(sgx, SGX) +OMAP3_HAS_FEATURE(iva, IVA) +OMAP3_HAS_FEATURE(neon, NEON) +OMAP3_HAS_FEATURE(isp, ISP) + #endif |