diff options
Diffstat (limited to 'src/mainboard/digitallogic/msm800sev')
-rw-r--r-- | src/mainboard/digitallogic/msm800sev/cache_as_ram_auto.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/mainboard/digitallogic/msm800sev/cache_as_ram_auto.c b/src/mainboard/digitallogic/msm800sev/cache_as_ram_auto.c new file mode 100644 index 0000000000..1282bd5554 --- /dev/null +++ b/src/mainboard/digitallogic/msm800sev/cache_as_ram_auto.c @@ -0,0 +1,118 @@ +#define ASSEMBLY 1 + +#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 "ram/ramtest.c" +#include "cpu/x86/bist.h" +#include "cpu/x86/msr.h" +#include <cpu/amd/lxdef.h> +#include <cpu/amd/geode_post_code.h> +#include "southbridge/amd/cs5536/cs5536.h" + +#define POST_CODE(x) outb(x, 0x80) +#define SERIAL_DEV PNP_DEV(0x2e, W83627HF_SP1) + +#include "southbridge/amd/cs5536/cs5536_early_smbus.c" +#include "southbridge/amd/cs5536/cs5536_early_setup.c" +#include "superio/winbond/w83627hf/w83627hf_early_serial.c" + +static inline int spd_read_byte(unsigned device, unsigned address) +{ + return smbus_read_byte(device, address); +} + +#define ManualConf 0 /* Do automatic strapped PLL config */ +#define PLLMSRhi 0x00001490 /* manual settings for the PLL */ +#define PLLMSRlo 0x02000030 +#define DIMM0 0xA0 +#define DIMM1 0xA2 +#include "northbridge/amd/lx/raminit.h" +#include "northbridge/amd/lx/pll_reset.c" +#include "northbridge/amd/lx/raminit.c" +#include "sdram/generic_sdram.c" +#include "cpu/amd/model_lx/cpureginit.c" +#include "cpu/amd/model_lx/syspreinit.c" + +static void msr_init(void) +{ + msr_t msr; + /* Setup access to the MC for under 1MB. Note MC not setup yet. */ + msr.hi = 0x24fffc02; + msr.lo = 0x10010000; + wrmsr(CPU_RCONF_DEFAULT, msr); + + msr.hi = 0x20000000; + msr.lo = 0xfff00; + wrmsr(MSR_GLIU0 + 0x20, msr); + + msr.hi = 0x20000000; + msr.lo = 0xfff00; + wrmsr(MSR_GLIU1 + 0x20, msr); + +} + +static void mb_gpio_init(void) +{ + /* Early mainboard specific GPIO setup */ +} + +void cache_as_ram_main(void) +{ + extern void RestartCAR(); + POST_CODE(0x01); + + 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_disable_internal_uart(); + w83627hf_enable_serial(SERIAL_DEV, TTYS0_BASE); + mb_gpio_init(); + uart_init(); + console_init(); + + pll_reset(ManualConf); + + cpuRegInit(); + + sdram_initialize(1, memctrl); + + /* Check all of memory */ + ram_check(0x00000000, 640*1024); + + /* Switch from Cache as RAM to real RAM */ + /* There are two ways we could think about this. + 1. If we are using the auto.inc ROMCC way, the stack is going to be re-setup in the code following this code. + Just wbinvd the stack to clear the cache tags. We don't care where the stack used to be. + 2. This file is built as a normal .c -> .o and linked in etc. The stack might be used to return etc. + That means we care about what is in the stack. If we are smart we set the CAR stack to the same location + as the rest of LinuxBIOS. If that is the case we can just do a wbinvd. The stack will be written into real + RAM that is now setup and we continue like nothing happened. If the stack is located somewhere other than + where LB would like it, you need to write some code to do a copy from cache to RAM + + We use method 1 on Norwich. + */ + POST_CODE(0x02); + print_err("POST 02\n"); + __asm__("wbinvd\n"); + print_err("Past wbinvd\n"); + /* we are finding the return does not work on this board. Explicitly call the label that is + * after the call to us. This is gross, but sometimes at this level it is the only way out + */ + done_cache_as_ram_main(); +} |