diff options
Diffstat (limited to 'src/northbridge/intel')
| -rw-r--r-- | src/northbridge/intel/e7505/raminit.c | 89 | ||||
| -rw-r--r-- | src/northbridge/intel/e7505/reset_test.c | 18 |
2 files changed, 46 insertions, 61 deletions
diff --git a/src/northbridge/intel/e7505/raminit.c b/src/northbridge/intel/e7505/raminit.c index 21ffba22b5..29eb42b133 100644 --- a/src/northbridge/intel/e7505/raminit.c +++ b/src/northbridge/intel/e7505/raminit.c @@ -464,27 +464,25 @@ static const uint32_t pull_updown_offset_table[] = { Delay functions: -----------------------------------------------------------------------------*/ +/* Estimate that SLOW_DOWN_IO takes about 1 us */ #define SLOW_DOWN_IO inb(0x80) -//#define SLOW_DOWN_IO udelay(40); - - /* Estimate that SLOW_DOWN_IO takes about 50&76us */ - /* delay for 200us */ - -#if 1 -static void do_delay(void) +static inline void local_udelay(int i) { - int i; - for (i = 0; i < 16; i++) { + while (i--) { SLOW_DOWN_IO; } } -#define DO_DELAY do_delay() -#else -#define DO_DELAY \ - udelay(200) -#endif +static inline void local_mdelay(int i) +{ + i *= 1000; + while (i--) { + SLOW_DOWN_IO; + } +} +/* delay for 200us */ +#define DO_DELAY local_udelay(200) #define EXTRA_DELAY DO_DELAY /*----------------------------------------------------------------------------- @@ -913,8 +911,10 @@ static void do_ram_command(uint8_t command, uint16_t jedec_mode_bits) // RAM_COMMAND_NORMAL is an exception. // It affects only the memory controller and does not need to be "sent" to the DIMMs. - if (command == RAM_COMMAND_NORMAL) + if (command == RAM_COMMAND_NORMAL) { + EXTRA_DELAY; return; + } // NOTE: for mode select commands, some of the location address bits are part of the command // Map JEDEC mode bits to E7505 @@ -949,7 +949,7 @@ static void do_ram_command(uint8_t command, uint16_t jedec_mode_bits) dimm_start_64M_multiple = dimm_end_64M_multiple; } } - + EXTRA_DELAY; } /** @@ -1169,6 +1169,7 @@ static void configure_e7501_ram_addresses(const struct mem_controller * If we're configured to use ECC, initialize the SDRAM and clear the E7501's * ECC error flags. */ +#ifdef __ROMCC__ static void initialize_ecc(void) { uint32_t dram_controller_mode; @@ -1202,6 +1203,7 @@ static void initialize_ecc(void) } } +#endif /** * Program the DRAM Timing register (DRT) of the E7501 (except for CAS# @@ -1898,12 +1900,10 @@ Public interface: * refresh and initialize ECC and memory to zero. Upon exit, SDRAM is up * and running. * - * @param controllers Not used. * @param ctrl PCI addresses of memory controller functions, and SMBus * addresses of DIMM slots on the mainboard. */ -static void sdram_enable(int controllers, - const struct mem_controller *ctrl) +static void sdram_enable(const struct mem_controller *ctrl) { uint8_t dimm_mask = pci_read_config16(MCHDEV, SKPD); uint32_t dram_controller_mode; @@ -1921,12 +1921,10 @@ static void sdram_enable(int controllers, /* 3. Apply NOP */ RAM_DEBUG_MESSAGE("Ram Enable 3\n"); do_ram_command(RAM_COMMAND_NOP, 0); - EXTRA_DELAY; /* 4 Precharge all */ RAM_DEBUG_MESSAGE("Ram Enable 4\n"); do_ram_command(RAM_COMMAND_PRECHARGE, 0); - EXTRA_DELAY; /* wait until the all banks idle state... */ /* 5. Issue EMRS to enable DLL */ @@ -1934,7 +1932,6 @@ static void sdram_enable(int controllers, do_ram_command(RAM_COMMAND_EMRS, SDRAM_EXTMODE_DLL_ENABLE | SDRAM_EXTMODE_DRIVE_NORMAL); - EXTRA_DELAY; /* 6. Reset DLL */ RAM_DEBUG_MESSAGE("Ram Enable 6\n"); @@ -1949,33 +1946,17 @@ static void sdram_enable(int controllers, /* 7 Precharge all */ RAM_DEBUG_MESSAGE("Ram Enable 7\n"); do_ram_command(RAM_COMMAND_PRECHARGE, 0); - EXTRA_DELAY; /* 8 Now we need 2 AUTO REFRESH / CBR cycles to be performed */ - RAM_DEBUG_MESSAGE("Ram Enable 8\n"); - do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY; - do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY; - /* And for good luck 6 more CBRs */ - do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY; - do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY; - do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY; - do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY; - do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY; - do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY; + RAM_DEBUG_MESSAGE("Ram Enable 8\n"); + int i; + for(i=0; i<8; i++) + do_ram_command(RAM_COMMAND_CBR, 0); /* 9 mode register set */ RAM_DEBUG_MESSAGE("Ram Enable 9\n"); set_ram_mode(E7501_SDRAM_MODE | SDRAM_MODE_NORMAL); - EXTRA_DELAY; /* 10 DDR Receive FIFO RE-Sync */ RAM_DEBUG_MESSAGE("Ram Enable 10\n"); @@ -1985,7 +1966,6 @@ static void sdram_enable(int controllers, /* 11 normal operation */ RAM_DEBUG_MESSAGE("Ram Enable 11\n"); do_ram_command(RAM_COMMAND_NORMAL, 0); - EXTRA_DELAY; // Reconfigure the row boundaries and Top of Low Memory // to match the true size of the DIMMs @@ -1996,7 +1976,11 @@ static void sdram_enable(int controllers, dram_controller_mode |= (1 << 29); pci_write_config32(MCHDEV, DRC, dram_controller_mode); EXTRA_DELAY; + +#ifdef __ROMCC__ + /* Problems with cache-as-ram, disable for now */ initialize_ecc(); +#endif dram_controller_mode = pci_read_config32(MCHDEV, DRC); /* FCS_EN */ dram_controller_mode |= (1 << 17); // NOTE: undocumented reserved bit @@ -2069,3 +2053,22 @@ static void sdram_set_registers(const struct mem_controller *ctrl) ram_handle_d060_2(); } +/** + * + * + */ +void sdram_initialize(int controllers, const struct mem_controller *memctrl) +{ + RAM_DEBUG_MESSAGE("Northbridge prior to SDRAM init:\n"); + DUMPNORTH(); + + sdram_set_registers(memctrl); + sdram_set_spd_registers(memctrl); + sdram_enable(memctrl); +} + +static int bios_reset_detected(void) +{ + uint32_t dword = pci_read_config32(MCHDEV, DRC); + return !!(dword & DRC_DONE); +} diff --git a/src/northbridge/intel/e7505/reset_test.c b/src/northbridge/intel/e7505/reset_test.c deleted file mode 100644 index 1c0dad5ed9..0000000000 --- a/src/northbridge/intel/e7505/reset_test.c +++ /dev/null @@ -1,18 +0,0 @@ -/* Convert to C by yhlu */ -#define MCH_DRC 0x7c -#define DRC_DONE (1 << 29) - /* If I have already booted once skip a bunch of initialization */ - /* To see if I have already booted I check to see if memory - * has been enabled. - */ -static int bios_reset_detected(void) { - uint32_t dword; - - dword = pci_read_config32(PCI_DEV(0, 0, 0), MCH_DRC); - - if( (dword & DRC_DONE) != 0 ) { - return 1; - } - - return 0; -} |