snow: make romstage init DRAM controller and call ramstage

This is a first cut at a romstage. It sets up memory, although that
needs some work; and finds and loads a ramstage.

Change-Id: I02a0eb48828500bf83c3c57d4bacb396e58bf9a5
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2245
Tested-by: build bot (Jenkins)

1 files changed, 72 insertions, 17 deletions

diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c
index 3f3f3ec38a..fae371a3de 100644
--- a/src/mainboard/google/snow/romstage.c
+++ b/src/mainboard/google/snow/romstage.c
@@ -19,35 +19,90 @@
 
 #include <types.h>
 #include <system.h>
-#include <cache.h>
-
-#if 0
-#include <arch/io.h>
 
-/* FIXME: make i2c.h use standard types */
-#define uchar unsigned char
-#define uint  unsigned int
-#include <device/i2c.h>
+#include <cache.h>
+#include <cbfs.h>
+#include <common.h>
 
-#include <cpu/samsung/s5p-common/s3c24x0_i2c.h>
-#include "cpu/samsung/exynos5250/dmc.h"
-#include <cpu/samsung/exynos5250/power.h>
+#include <cpu/samsung/exynos5250/setup.h>
+#include <cpu/samsung/exynos5250/dmc.h>
 #include <cpu/samsung/exynos5250/clock_init.h>
-#include <cpu/samsung/exynos5-common/uart.h>
-#endif
 #include <console/console.h>
+#include <arch/bootblock_exit.h>
+#include <arch/stages.h>
 
-void main(void);
 void main(void)
 {
-//	volatile unsigned long *pshold = (unsigned long *)0x1004330c;
+	struct cbfs_media cbfs;
 //	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 //	power_init();
 //	clock_init();
 //	exynos_pinmux_config(PERIPH_ID_UART3, PINMUX_FLAG_NONE);
 	console_init();
 	printk(BIOS_INFO, "hello from romstage\n");
+	struct mem_timings *mem;
+	int ret;
+
+	mem = clock_get_mem_timings();
+	printk(BIOS_SPEW, "clock_get_mem_timings returns 0x%p\n", mem);
+	printk(BIOS_SPEW, "man: 0x%x type: 0x%x, div: 0x%x, mhz: 0x%x\n",
+		mem->mem_manuf,
+		mem->mem_type,
+		mem->mpll_mdiv,
+		mem->frequency_mhz);
+
+       ret = ddr3_mem_ctrl_init(mem, DMC_INTERLEAVE_SIZE);
+       if (ret) {
+               printk(BIOS_ERR, "Memory controller init failed, err: %x\n",
+                      ret);
+               while(1);
+       }
+
+       printk(BIOS_INFO, "ddr3_init done\n");
+       /* wow, did it work? */
+	int i;
+	u32 *c = (void *)CONFIG_RAMBASE;
+
+//	mmu_setup(CONFIG_SYS_SDRAM_BASE, CONFIG_DRAM_SIZE_MB * 1024);
+//      printk(BIOS_INFO, "mmu_setup done\n");
+	for(i = 0; i < 16384; i++)
+		c[i] = i+32768;
+	for(i = 0; i < 16384; i++)
+		if (c[i] != i+32768)
+			printk(BIOS_SPEW, "BADc[%02x]: %02x,", i, c[i]);
+	for(i = 0; i < 1048576; i++)
+		c[i] = 0;
+	ret = init_default_cbfs_media(&cbfs);
+	if (ret){
+		printk(BIOS_ERR, "init_default_cbfs_media returned %d: HALT\n",
+		       ret);
+		while (1);
+	}
+
+	struct cbfs_stage *stage = (struct cbfs_stage *)
+		cbfs_get_file_content(&cbfs, "fallback/coreboot_ram",
+				      CBFS_TYPE_STAGE);
+	printk(BIOS_ERR, "Stage: %p\n", stage);
+	printk(BIOS_ERR, "loading stage %s @ 0x%x (0x%x bytes),entry @ 0x%p\n",
+	       "ram stage",
+	       (uint32_t) stage->load, stage->memlen,
+	       (void *)(u32)stage->entry);
+
+#if 0
+	/* for reference and testing ... we should be able to remove soon */
+//	c = (void *)(u32)(stage->load + stage->len);
+	c = (void *)(u32)(stage->load);
+	printk(BIOS_ERR, "memzero 0x%x words starting at %p\n",
+	       (stage->memlen /*- stage->len*/)/4, c);
+	for(i = 0; i < (stage->memlen /*- stage->len*/)/4; i++){
+		printk(BIOS_INFO, "%p, ", &c[i]);
+		c[i] = 0;
+	}
+#endif
+
+	void *entry = cbfs_load_stage(&cbfs, "fallback/coreboot_ram");
+	printk(BIOS_INFO, "entry is %p\n", entry);
 
-//	*pshold &= ~0x100;	/* shut down */
-	mmu_setup(CONFIG_SYS_SDRAM_BASE, CONFIG_DRAM_SIZE_MB * 1024);
+	printk(BIOS_INFO, "sayonara, romstage!\n");
+	stage_exit((unsigned long)entry);
 }