armv7/snow: get to romstage

This patch does a few things to get us into romstage:
- Add romstage as a stage (a later patch adds it as a binary, which
  is probably wrong). The Makefile magic is complex enough that we
  let it build the XIP file for now, but we no longer use it.

- Replace findstage with loadstage. Loadstage will find a stage,
  load the code to memory, and zero the remaining part of memory.
  Now we can link the romstage to go anywhere!

- Eliminate magic offsets from code/ldscripts and centralize Kconfig
  variables in src/cpu/samsung/exynos5250/Kconfig.

- Tidy up code and serial output

Change-Id: Iae4d2f9e7f429cb1df15d49daf9a08b88d75d79d
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/2174
Tested-by: build bot (Jenkins)

1 files changed, 25 insertions, 0 deletions

diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c
index e2af2c0c4e..45016a5434 100644
--- a/src/mainboard/google/snow/romstage.c
+++ b/src/mainboard/google/snow/romstage.c
@@ -21,6 +21,22 @@
 #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 <cpu/samsung/s5p-common/s3c24x0_i2c.h>
+#include "cpu/samsung/exynos5250/dmc.h"
+#include <cpu/samsung/exynos5250/power.h>
+#include <cpu/samsung/exynos5250/clock_init.h>
+#include <cpu/samsung/exynos5-common/uart.h>
+#endif
+#include <console/console.h>
+
 static void mmu_setup(void)
 {
 	dram_bank_mmu_setup(CONFIG_SYS_SDRAM_BASE, CONFIG_DRAM_SIZE_MB * 1024);
@@ -29,5 +45,14 @@ static void mmu_setup(void)
 void main(void);
 void main(void)
 {
+//	volatile unsigned long *pshold = (unsigned long *)0x1004330c;
+//	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");
+
+//	*pshold &= ~0x100;	/* shut down */
 	mmu_setup();
 }