From 734daf699ceb8603f53003ab36eb85b8a76e3cf9 Mon Sep 17 00:00:00 2001 From: Marc Jones Date: Fri, 4 May 2007 18:58:42 +0000 Subject: This patch adds support for the northbridge integrated into the AMD Geode LX platform, including memory and graphics. (rediffed for whitespace) Signed-off-by: Marc Jones Acked-by: Stefan Reinauer git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2630 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1 --- src/northbridge/amd/lx/pll_reset.c | 85 +++++++++++++++++++++++++++++--------- 1 file changed, 66 insertions(+), 19 deletions(-) (limited to 'src/northbridge/amd/lx/pll_reset.c') diff --git a/src/northbridge/amd/lx/pll_reset.c b/src/northbridge/amd/lx/pll_reset.c index 13e21be8de..39a2e270fc 100644 --- a/src/northbridge/amd/lx/pll_reset.c +++ b/src/northbridge/amd/lx/pll_reset.c @@ -1,6 +1,10 @@ -#define POST_CODE(x) outb(0x80, x) +/* +* +* Copyright (C) 2007 Advanced Micro Devices +* +*/ -static void pll_reset(void) +static void pll_reset(char manualconf) { msr_t msrGlcpSysRstpll; @@ -12,32 +16,75 @@ static void pll_reset(void) print_debug_hex32(msrGlcpSysRstpll.hi); print_debug(":"); print_debug_hex32(msrGlcpSysRstpll.lo); - print_debug("\n"); + print_debug("\r\n"); + POST_CODE(POST_PLL_INIT); - msrGlcpSysRstpll.lo &= 0x80000000; - - // If the "we've already been here" flag is set, don't reconfigure the pll - if ( !(msrGlcpSysRstpll.lo) ) - { // we haven't configured the PLL; do it now - print_debug("CONFIGURING PLL"); - - POST_CODE(0x77); - - // HARDCODED VALUES MOVED BACK TO auto.c AS THEY HAVE TO BE BOARD-SPECIFIC - // (this file is included from there) - + if (!(msrGlcpSysRstpll.lo & (1 << RSTPLL_LOWER_SWFLAGS_SHIFT))){ + print_debug("Configuring PLL\n"); + if(manualconf){ + POST_CODE(POST_PLL_MANUAL); /* CPU and GLIU mult/div (GLMC_CLK = GLIU_CLK / 2) */ msrGlcpSysRstpll.hi = PLLMSRhi; /* Hold Count - how long we will sit in reset */ msrGlcpSysRstpll.lo = PLLMSRlo; - + } + else{ + /*automatic configuration (straps)*/ + POST_CODE(POST_PLL_STRAP); + msrGlcpSysRstpll.lo &= ~(0xFF << RSTPPL_LOWER_HOLD_COUNT_SHIFT); + msrGlcpSysRstpll.lo |= (0xDE << RSTPPL_LOWER_HOLD_COUNT_SHIFT); + msrGlcpSysRstpll.lo &= ~(RSTPPL_LOWER_COREBYPASS_SET | RSTPPL_LOWER_MBBYPASS_SET); + msrGlcpSysRstpll.lo |= RSTPPL_LOWER_COREPD_SET | RSTPPL_LOWER_CLPD_SET; + } /* Use SWFLAGS to remember: "we've already been here" */ - msrGlcpSysRstpll.lo |= 0x80000000; + msrGlcpSysRstpll.lo |= (1 << RSTPLL_LOWER_SWFLAGS_SHIFT); /* "reset the chip" value */ - msrGlcpSysRstpll.lo |= 0x00000001; - + msrGlcpSysRstpll.lo |= RSTPPL_LOWER_CHIP_RESET_SET; wrmsr(GLCP_SYS_RSTPLL, msrGlcpSysRstpll); + + /* You should never get here..... The chip has reset.*/ + print_debug("CONFIGURING PLL FAILURE\n"); + POST_CODE(POST_PLL_RESET_FAIL); + __asm__ __volatile__("hlt\n"); + + } + print_debug("Done cpuRegInit\n"); + return; +} + +static unsigned int CPUSpeed(void){ + unsigned int speed; + msr_t msr; + + msr = rdmsr(GLCP_SYS_RSTPLL); + speed = ((((msr.hi >> RSTPLL_UPPER_CPUMULT_SHIFT) & 0x1F)+1)*333)/10; + if((((((msr.hi >> RSTPLL_UPPER_CPUMULT_SHIFT) & 0x1F)+1)*333)%10) > 5){ + ++speed; + } + return(speed); +} +static unsigned int GeodeLinkSpeed(void){ + unsigned int speed; + msr_t msr; + + msr = rdmsr(GLCP_SYS_RSTPLL); + speed = ((((msr.hi >> RSTPLL_UPPER_GLMULT_SHIFT) & 0x1F)+1)*333)/10; + if((((((msr.hi >> RSTPLL_UPPER_GLMULT_SHIFT) & 0x1F)+1)*333)%10) > 5){ + ++speed; } + return(speed); } +static unsigned int PCISpeed(void){ + msr_t msr; + + msr = rdmsr(GLCP_SYS_RSTPLL); + if (msr.hi & (1 << RSTPPL_LOWER_PCISPEED_SHIFT)){ + return(66); + } + else{ + return(33); + } +} + -- cgit v1.2.3