diff options
Diffstat (limited to 'src/mainboard/olpc/btest/romstage.c')
| -rw-r--r-- | src/mainboard/olpc/btest/romstage.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/mainboard/olpc/btest/romstage.c b/src/mainboard/olpc/btest/romstage.c new file mode 100644 index 000000000000..21363b719933 --- /dev/null +++ b/src/mainboard/olpc/btest/romstage.c @@ -0,0 +1,194 @@ +#define ASSEMBLY 1 +#define __PRE_RAM__ + +#include <stdint.h> +#include <device/pci_def.h> +#include <arch/io.h> +#include <device/pnp_def.h> +#include <arch/romcc_io.h> +#include <arch/hlt.h> +#include "pc80/serial.c" +#include "arch/i386/lib/console.c" +#include "lib/ramtest.c" +#include "superio/winbond/w83627hf/w83627hf_early_serial.c" +#include "cpu/x86/bist.h" +#include "cpu/x86/msr.h" +#include <cpu/amd/gx2def.h> + +#define SERIAL_DEV PNP_DEV(0x2e, W83627HF_SP1) + +#include "southbridge/amd/cs5536/cs5536_early_smbus.c" +#include "southbridge/amd/cs5536/cs5536_early_setup.c" + +static inline int spd_read_byte(unsigned device, unsigned address) +{ + return smbus_read_byte(device, address); +} + +#include "northbridge/amd/gx2/raminit.h" + +static inline unsigned int fls(unsigned int x) +{ + int r; + + __asm__("bsfl %1,%0\n\t" + "jnz 1f\n\t" + "movl $32,%0\n" + "1:" : "=r" (r) : "g" (x)); + return r; +} + + + + +/* sdram parameters for OLPC: + row address = 13 + col address = 9 + banks = 4 + dimm0size=128MB + d0_MB=1 (module banks) + d0_cb=4 (component banks) + do_psz=4KB (page size) + Trc=10 (clocks) (ref2act) + Tras=7 (act2pre) + Trcd=3 (act2cmd) + Trp=3 (pre2act) + Trrd=2 (act2act) + Tref=17.8ms + */ +static void sdram_set_spd_registers(const struct mem_controller *ctrl) +{ + /* Total size of DIMM = 2^row address (byte 3) * 2^col address (byte 4) * + * component Banks (byte 17) * module banks, side (byte 5) * + * width in bits (byte 6,7) + * = Density per side (byte 31) * number of sides (byte 5) */ + /* 1. Initialize GLMC registers base on SPD values, do one DIMM for now */ + msr_t msr; + unsigned char module_banks, val; + + msr = rdmsr(MC_CF07_DATA); + + /* get module banks (sides) per dimm, SPD byte 5 */ + module_banks = 1; + module_banks >>= 1; + msr.hi &= ~(1 << CF07_UPPER_D0_MB_SHIFT); + msr.hi |= (module_banks << CF07_UPPER_D0_MB_SHIFT); + + /* get component banks per module bank, SPD byte 17 */ + val = 4; + val >>= 2; + msr.hi &= ~(0x1 << CF07_UPPER_D0_CB_SHIFT); + msr.hi |= (val << CF07_UPPER_D0_CB_SHIFT); + + /* get the module bank density, SPD byte 31 */ + /* this is multiples of 8 MB */ + /* actually it is 2^x*4, where x is the value you put in */ + /* for OLPC, set default size */ + /* dimm size - hardcoded 128Mb */ + val = 5; + msr.hi &= ~(0xf << CF07_UPPER_D0_SZ_SHIFT); + msr.hi |= (val << CF07_UPPER_D0_SZ_SHIFT); + + /* page size = 2^col address */ + val = 2; /* 4096 bytes */ + msr.hi &= ~(0x7 << CF07_UPPER_D0_PSZ_SHIFT); + msr.hi |= (val << CF07_UPPER_D0_PSZ_SHIFT); + + print_debug("computed msr.hi "); + print_debug_hex32(msr.hi); + print_debug("\r\n"); + + /* this is a standard value, DOES NOT PROBABLY MATCH FROM ABOVE */ + /* well, it may be close. It's about 200,000 ticks */ + msr.lo = 0x00003000; + wrmsr(MC_CF07_DATA, msr); + + /* timing and mode ... */ + + msr = rdmsr(0x20000019); + + /* per standard bios settings */ + + msr.hi = 0x18000108; + msr.lo = + (6<<28) | // cas_lat + (10<<24)| // ref2act + (7<<20)| // act2pre + (3<<16)| // pre2act + (3<<12)| // act2cmd + (2<<8)| // act2act + (2<<6)| // dplwr + (2<<4)| // dplrd + (3); // dal + /* the msr value reported by quanta is very, very different. + * we will go with that value for now. + */ + msr.lo = 0x286332a3; + + wrmsr(0x20000019, msr); + +} + +#include "northbridge/amd/gx2/raminit.c" +#include "lib/generic_sdram.c" + +#define PLLMSRhi 0x00001490 +#define PLLMSRlo 0x02000030 +#define PLLMSRlo1 ((0xde << 16) | (1 << 26) | (1 << 24)) +#define PLLMSRlo2 ((1<<14) |(1<<13) | (1<<0)) +#include "northbridge/amd/gx2/pll_reset.c" +#include "cpu/amd/model_gx2/cpureginit.c" +#include "cpu/amd/model_gx2/syspreinit.c" +static void msr_init(void) +{ + __builtin_wrmsr(0x1808, 0x10f3bf00, 0x22fffc02); + + __builtin_wrmsr(0x10000020, 0xfff80, 0x20000000); + __builtin_wrmsr(0x10000021, 0x80fffe0, 0x20000000); + + __builtin_wrmsr(0x40000020, 0xfff80, 0x20000000); + __builtin_wrmsr(0x40000021, 0x80fffe0, 0x20000000); +} + +static void gpio_init(void) +{ + unsigned long m; + + /* Make sure events enable for gpio 12 is off */ + + m = inl(GPIOL_EVENTS_ENABLE); + m &= ~GPIOL_12_SET; + m |= GPIOL_12_CLEAR; + outl(m, GPIOL_EVENTS_ENABLE); +} + +static void main(unsigned long bist) +{ + static const struct mem_controller memctrl [] = { + {.channel0 = {(0xa<<3)|0, (0xa<<3)|1}} + }; + + SystemPreInit(); + msr_init(); + + cs5536_early_setup(); + + /* NOTE: must do this AFTER the early_setup! + * it is counting on some early MSR setup + * for cs5536 + */ + cs5536_setup_onchipuart(); + gpio_init(); + uart_init(); + console_init(); + + pll_reset(); + + cpuRegInit(); + print_err("done cpuRegInit\n"); + + sdram_initialize(1, memctrl); + + /* Check all of memory */ + //ram_check(0x00000000, 640*1024); +} |