From 75869ff4111ded406e7bf702132a17005da85be1 Mon Sep 17 00:00:00 2001
From: "Ronald G. Minnich" <rminnich@gmail.com>
Date: Fri, 4 May 2007 23:15:28 +0000
Subject: [PATCH] This patch as a cache_as_ram_auto.c for the msm800sev.

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Acked-by: Stefan Reinauer <stepan@coresystems.de>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2636 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
---
 .../msm800sev/cache_as_ram_auto.c             | 118 ++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 src/mainboard/digitallogic/msm800sev/cache_as_ram_auto.c

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();
+}