From 8384ce071365244332ea05c81112bfffcf48be87 Mon Sep 17 00:00:00 2001 From: Sanjeev Premi Date: Sun, 22 Nov 2009 10:10:53 -0800 Subject: omap3: Runtime detection of Si features The OMAP35x family has multiple variants differing in the HW features. This patch detects these features at runtime and prints information during the boot. Since most of the code seemed repetitive, macros have been used for readability. Signed-off-by: Sanjeev Premi Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/id.c | 52 +++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 49 insertions(+), 3 deletions(-) (limited to 'arch/arm/mach-omap2') diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c index d28e6fec7e4..d7ac8d54714 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; -- cgit v1.2.3