diff options
Diffstat (limited to 'src/northbridge/amd')
| -rw-r--r-- | src/northbridge/amd/gx2/pll_reset.c | 82 | ||||
| -rw-r--r-- | src/northbridge/amd/gx2/raminit.c | 12 |
2 files changed, 51 insertions, 43 deletions
diff --git a/src/northbridge/amd/gx2/pll_reset.c b/src/northbridge/amd/gx2/pll_reset.c index 43c3ff144d..a32f678176 100644 --- a/src/northbridge/amd/gx2/pll_reset.c +++ b/src/northbridge/amd/gx2/pll_reset.c @@ -86,33 +86,38 @@ static const unsigned char fbdiv2plldiv[] = { 49, 40, 19, 59, 32, 54, 35, 0, 41, 60, 55, 0, 61, 0, 0, 0 }; -#if 1 -static void get_memory_speed(void) +static const unsigned char pci33_sdr_crt [] = { + /* FbDIV, VDIV, MDIV CPU/GeodeLink */ + 12, 2, 4, // 200/100 + 16, 2, 4, // 266/133 + 18, 2, 5, // 300/120 + 20, 2, 5, // 333/133 + 22, 2, 6, // 366/122 + 24, 2, 6, // 400/133 + 26, 2, 6 // 433/144 +}; + +static const unsigned char pci33_ddr_crt [] = { + /* FbDIV, VDIV, MDIV CPU/GeodeLink */ + 12, 2, 3, // 200/133 + 16, 2, 3, // 266/177 + 18, 2, 3, // 300/200 + 20, 2, 3, // 333/222 + 22, 2, 3, // 366/244 + 24, 2, 3, // 400/266 + 26, 2, 3 // 433/289 +}; + +static unsigned int get_memory_speed(void) { - unsigned char val; - - val = do_smbus_read_byte(0x6000, 0xA0, 0); - print_debug("SPD byte "); - print_debug_hex8(0); - print_debug(" = "); - print_debug_hex8(val); - print_debug("\r\n"); - - val = do_smbus_read_byte(0x6000, 0xA0, 1); - print_debug("SPD byte "); - print_debug_hex8(1); - print_debug(" = "); - print_debug_hex8(val); - print_debug("\r\n"); - - val = do_smbus_read_byte(0x6000, 0xA0, 2); - print_debug("SPD byte "); - print_debug_hex8(2); - print_debug(" = "); - print_debug_hex8(val); - print_debug("\r\n"); + unsigned char val, hi, lo; + + val = spd_read_byte(0xA0, 9); + hi = (val >> 4) & 0x0f; + lo = val & 0x0f; + + return 20000/(hi*10 + lo); } -#endif static void pll_reset(void) { @@ -125,14 +130,10 @@ static void pll_reset(void) print_debug("Cpu core is "); print_debug_hex32(cpu_core); print_debug("\n"); - //get_memory_speed(); - //msr = rdmsr(GLCP_SYS_RSTPLL); - msr = rdmsr(0x4c000014); - print_debug("4c000014 is "); - print_debug_hex32(msr.hi); print_debug(":"); print_debug_hex32(msr.lo); print_debug("\n"); - if (msr.lo & (1 << GLCP_SYS_RSTPLL_BYPASS)) { - print_debug("disable PLL bypass\n\r"); + msr = rdmsr(GLCP_SYS_RSTPLL); + if (msr.lo & (1 << GLCP_SYS_RSTPLL_BYPASS)) { +#if 0 msr.hi = PLLMSRhi; msr.lo = PLLMSRlo; wrmsr(GLCP_SYS_RSTPLL, msr); @@ -144,6 +145,10 @@ static void pll_reset(void) msr.lo |= PLLMSRlo2; wrmsr(GLCP_SYS_RSTPLL,msr); print_debug("should not be here\n\r"); +#endif + print_err("shit"); + while (1) + ; } if (msr.lo & GLCP_SYS_RSTPLL_SWFLAGS_MASK) { @@ -152,25 +157,16 @@ static void pll_reset(void) return; } - print_debug("prgramming PLL\n\r"); - + /* get the sysref clock rate */ vdiv = (msr.hi >> GLCP_SYS_RSTPLL_VDIV_SHIFT) & 0x07; vdiv += 2; fbdiv = (msr.hi >> GLCP_SYS_RSTPLL_FBDIV_SHIFT) & 0x3f; fbdiv = fbdiv2plldiv[fbdiv]; - spll_raw = cpu_core * vdiv; sysref = spll_raw / fbdiv; - print_debug("SYSREF/PCI Clock "); - print_debug_hex32(sysref); - print_debug("\n\r"); - + /* get target memory rate by SPD */ //gliu = get_memory_speed(); - //get_memory_speed(); - //print_debug("Target Memory Clock "); - //print_debug_hex32(gliu); - //print_debug("\n\r"); msr.hi = 0x00000019; msr.lo = 0x06de0378; diff --git a/src/northbridge/amd/gx2/raminit.c b/src/northbridge/amd/gx2/raminit.c index a2cc474a3a..f0156c3183 100644 --- a/src/northbridge/amd/gx2/raminit.c +++ b/src/northbridge/amd/gx2/raminit.c @@ -4,7 +4,19 @@ static void sdram_set_registers(const struct mem_controller *ctrl) { } +#if 0 +static void sdram_set_spd_registers(const struct mem_controller *ctrl) +{ + msr_t mst; + unsigned char val; + + /* get module banks per dimm, SPD byte 5 */ + val = spd_read_byte(0xA0, 5); + if (val < 1 || val > 2) + print_err("Module banks per dimm"); +} +#endif /* Section 6.1.3, LX processor databooks, BIOS Initialization Sequence * Section 4.1.4, GX/CS5535 GeodeROM Porting guide */ static void sdram_enable(int controllers, const struct mem_controller *ctrl) |