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#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);
}
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