diff options
Diffstat (limited to 'src/northbridge/intel')
| -rw-r--r-- | src/northbridge/intel/i440bx/raminit.c | 101 |
1 files changed, 42 insertions, 59 deletions
diff --git a/src/northbridge/intel/i440bx/raminit.c b/src/northbridge/intel/i440bx/raminit.c index e2db5e70ea..dddcc217f4 100644 --- a/src/northbridge/intel/i440bx/raminit.c +++ b/src/northbridge/intel/i440bx/raminit.c @@ -60,7 +60,7 @@ static const uint32_t refresh_rate_map[] = { 1, 5, 5, 2, 3, 4 }; -/* Table format: register, bitmask, value. */ +/* Table format: register, value. */ static const u8 register_values[] = { /* NBXCFG - NBX Configuration Register * 0x50 - 0x53 @@ -122,11 +122,11 @@ static const u8 register_values[] = { * 0 = A7# is sampled asserted (i.e., 0) * [01:00] Reserved */ - NBXCFG + 0, 0x00, 0x0c, + NBXCFG + 0, 0x0c, // TODO: Bit 15 should be 0 for multiprocessor boards - NBXCFG + 1, 0x00, 0x80, - NBXCFG + 2, 0x00, 0x00, - NBXCFG + 3, 0x00, 0xff, + NBXCFG + 1, 0x80, + NBXCFG + 2, 0x00, + NBXCFG + 3, 0xff, /* DRAMC - DRAM Control Register * 0x57 @@ -156,7 +156,7 @@ static const u8 register_values[] = { * 111 = Reserved */ /* Choose SDRAM (not registered), and disable refresh for now. */ - DRAMC, 0x00, 0x08, + DRAMC, 0x08, /* * PAM[6:0] - Programmable Attribute Map Registers @@ -190,13 +190,13 @@ static const u8 register_values[] = { * registers are not set here appropriately, the RAM in that region * will not be accessible, thus a RAM check of it will also fail. */ - PAM0, 0x00, 0x30, - PAM1, 0x00, 0x33, - PAM2, 0x00, 0x33, - PAM3, 0x00, 0x33, - PAM4, 0x00, 0x33, - PAM5, 0x00, 0x33, - PAM6, 0x00, 0x33, + PAM0, 0x30, + PAM1, 0x33, + PAM2, 0x33, + PAM3, 0x33, + PAM4, 0x33, + PAM5, 0x33, + PAM6, 0x33, /* DRB[0:7] - DRAM Row Boundary Registers * 0x60 - 0x67 @@ -214,14 +214,6 @@ static const u8 register_values[] = { * 0x67 DRB7 = Total memory in row0+1+2+3+4+5+6+7 (in 8 MB) */ /* DRBs will be set later. */ - DRB0, 0x00, 0x00, - DRB1, 0x00, 0x00, - DRB2, 0x00, 0x00, - DRB3, 0x00, 0x00, - DRB4, 0x00, 0x00, - DRB5, 0x00, 0x00, - DRB6, 0x00, 0x00, - DRB7, 0x00, 0x00, /* FDHC - Fixed DRAM Hole Control Register * 0x68 @@ -236,7 +228,7 @@ static const u8 register_values[] = { * [5:0] Reserved */ /* No memory holes. */ - FDHC, 0x00, 0x00, + FDHC, 0x00, /* RPS - SDRAM Row Page Size Register * 0x74 - 0x75 @@ -261,8 +253,6 @@ static const u8 register_values[] = { * [15:14] DRB[7], row 7 */ /* Power on defaults to 2KB. Will be set later. */ - // RPS + 0, 0x00, 0x00, - // RPS + 1, 0x00, 0x00, /* SDRAMC - SDRAM Control Register * 0x76 - 0x77 @@ -298,9 +288,9 @@ static const u8 register_values[] = { * 1 = 2 clocks of RAS# precharge */ #if CONFIG(SDRAMPWR_4DIMM) - SDRAMC + 0, 0x00, 0x10, /* The board has 4 DIMM slots. */ + SDRAMC, 0x10, /* The board has 4 DIMM slots. */ #else - SDRAMC + 0, 0x00, 0x00, /* The board has 3 DIMM slots. */ + SDRAMC, 0x00, /* The board has 3 DIMM slots. */ #endif /* PGPOL - Paging Policy Register @@ -325,40 +315,38 @@ static const u8 register_values[] = { * 0111 = 32 clocks * 1xxx = Infinite (pages are not closed for idle condition) */ - PGPOL + 0, 0x00, 0x00, - PGPOL + 1, 0x00, 0xff, + /* PGPOL will be set later. */ /* PMCR - Power Management Control Register * 0x7a * - * [07:07] Power Down SDRAM Enable (PDSE) - * 1 = Enable - * 0 = Disable - * [06:06] ACPI Control Register Enable (SCRE) - * 1 = Enable - * 0 = Disable (default) - * [05:05] Suspend Refresh Type (SRT) - * 1 = Self refresh mode - * 0 = CBR fresh mode - * [04:04] Normal Refresh Enable (NREF_EN) - * 1 = Enable - * 0 = Disable - * [03:03] Quick Start Mode (QSTART) - * 1 = Quick start mode for the processor is enabled - * [02:02] Gated Clock Enable (GCLKEN) - * 1 = Enable - * 0 = Disable - * [01:01] AGP Disable (AGP_DIS) - * 1 = Disable - * 0 = Enable - * [00:00] CPU reset without PCIRST enable (CRst_En) - * 1 = Enable - * 0 = Disable + * [7] Power Down SDRAM Enable (PDSE) + * 1 = Enable + * 0 = Disable + * [6] ACPI Control Register Enable (SCRE) + * 1 = Enable + * 0 = Disable (default) + * [5] Suspend Refresh Type (SRT) + * 1 = Self refresh mode + * 0 = CBR fresh mode + * [4] Normal Refresh Enable (NREF_EN) + * 1 = Enable + * 0 = Disable + * [3] Quick Start Mode (QSTART) + * 1 = Quick start mode for the processor is enabled + * [2] Gated Clock Enable (GCLKEN) + * 1 = Enable + * 0 = Disable + * [1] AGP Disable (AGP_DIS) + * 1 = AGP disabled (Hardware strap) + * [0] CPU reset without PCIRST enable (CRst_En) + * 1 = Enable + * 0 = Disable */ /* PMCR will be set later. */ /* Enable SCRR.SRRAEN and let BX choose the SRR. */ - SCRR + 1, 0x00, 0x10, + SCRR + 1, 0x10, }; /*----------------------------------------------------------------------------- @@ -666,7 +654,6 @@ Public interface. static void sdram_set_registers(void) { int i, max; - uint8_t reg; PRINT_DEBUG("Northbridge prior to SDRAM init:\n"); DUMPNORTH(); @@ -674,12 +661,8 @@ static void sdram_set_registers(void) max = ARRAY_SIZE(register_values); /* Set registers as specified in the register_values[] array. */ - for (i = 0; i < max; i += 3) { - reg = pci_read_config8(NB, register_values[i]); - reg &= register_values[i + 1]; - reg |= register_values[i + 2] & ~(register_values[i + 1]); - pci_write_config8(NB, register_values[i], reg); - } + for (i = 0; i < max; i += 2) + pci_write_config8(NB, register_values[i], register_values[i + 1]); } struct dimm_size { |