Date: Fri, 15 May 2009 01:53:09 +0000 (UTC) From: Oleksandr Tymoshenko <gonzo@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r192132 - projects/mips/sys/mips/atheros Message-ID: <200905150153.n4F1r9Bw008583@svn.freebsd.org>
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Author: gonzo Date: Fri May 15 01:53:09 2009 New Revision: 192132 URL: http://svn.freebsd.org/changeset/base/192132 Log: - Calculate CPU frequency using dividers from PLL registers Modified: projects/mips/sys/mips/atheros/ar71xx_machdep.c Modified: projects/mips/sys/mips/atheros/ar71xx_machdep.c ============================================================================== --- projects/mips/sys/mips/atheros/ar71xx_machdep.c Fri May 15 01:51:47 2009 (r192131) +++ projects/mips/sys/mips/atheros/ar71xx_machdep.c Fri May 15 01:53:09 2009 (r192132) @@ -97,8 +97,8 @@ platform_start(__register_t a0 __unused, __register_t a2 __unused, __register_t a3 __unused) { vm_offset_t kernend; - uint64_t platform_counter_freq; - uint32_t reg; + uint64_t platform_counter_freq, freq; + uint32_t reg, div, pll_config; /* clear the BSS and SBSS segments */ kernend = round_page((vm_offset_t)&end); @@ -118,11 +118,16 @@ platform_start(__register_t a0 __unused, * should be called first. */ init_param1(); - /* TODO: Get CPU freq from RedBoot. Is it possible? */ - platform_counter_freq = 680000000UL; + pll_config = ATH_READ_REG(AR71XX_PLL_CPU_CONFIG); + div = ((pll_config >> PLL_FB_SHIFT) & PLL_FB_MASK) + 1; + freq = div * AR71XX_BASE_FREQ; + div = ((pll_config >> PLL_CPU_DIV_SEL_SHIFT) & PLL_CPU_DIV_SEL_MASK) + + 1; + platform_counter_freq = freq / div; mips_timer_init_params(platform_counter_freq, 0); cninit(); + printf("platform frequency: %lld\n", platform_counter_freq); printf("arguments: \n"); printf(" a0 = %08x\n", a0); printf(" a1 = %08x\n", a1);
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