t132: Enable cbmem console support

Enabled CBMEM support for t132 platforms. Some of the existing
code is moved around to avoid dependencies in the other stages
that need it.

BUG=None
BRANCH=None
TEST=Built and booted a rush with cbmem support.

Original-Change-Id: I78a31b58ab9cc01a7b5d1fffdb6c8ae0c446c7dd
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/207163
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit f552197dbda06c754b5664c3bed4ed361154229a)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I8fa2919714b467cc976e5bb5c4716e5b7979694b
Reviewed-on: http://review.coreboot.org/8589
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/soc/nvidia/tegra132/Kconfig

@@ -83,4 +83,8 @@ config CBFS_CACHE_SIZE
 	hex "size of CBFS cache data"
 	default 0x00016000
 
+config CONSOLE_PRERAM_BUFFER_BASE
+	hex "memory address of the CBMEM console buffer"
+	default 0x40004020
+
 endif

src/soc/nvidia/tegra132/Makefile.inc

@@ -17,6 +17,7 @@ bootblock-$(CONFIG_DRIVERS_UART) += uart.c
 endif
 
 romstage-y += romstage_asm.S
+romstage-y += addressmap.c
 romstage-y += cbfs.c
 romstage-y += cbmem.c
 romstage-y += timer.c
@@ -35,6 +36,7 @@ romstage-y += ../tegra/i2c.c
 romstage-y += ../tegra/pinmux.c
 romstage-$(CONFIG_DRIVERS_UART) += uart.c
 
+ramstage-y += addressmap.c
 ramstage-y += cbfs.c
 ramstage-y += cbmem.c
 ramstage-y += timer.c

src/soc/nvidia/tegra132/addressmap.c

@@ -0,0 +1,52 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#include <arch/io.h>
+#include <stdlib.h>
+#include <console/console.h>
+#include <soc/addressmap.h>
+#include "mc.h"
+#include "sdram.h"
+
+/* returns total amount of DRAM (in MB) from memory controller registers */
+int sdram_size_mb(void)
+{
+	struct tegra_mc_regs *mc = (struct tegra_mc_regs *)TEGRA_MC_BASE;
+	static int total_size = 0;
+
+	if (total_size)
+		return total_size;
+
+	/*
+	 * This obtains memory size from the External Memory Aperture
+	 * Configuration register. Nvidia confirmed that it is safe to assume
+	 * this value represents the total physical DRAM size.
+	 */
+	total_size = (read32(&mc->emem_cfg) >> MC_EMEM_CFG_SIZE_MB_SHIFT) &
+		      MC_EMEM_CFG_SIZE_MB_MASK;
+
+	printk(BIOS_DEBUG, "%s: Total SDRAM (MB): %u\n", __func__, total_size);
+	return total_size;
+}
+
+uintptr_t sdram_max_addressable_mb(void)
+{
+	return MIN((CONFIG_SYS_SDRAM_BASE/MiB) + sdram_size_mb(), 4096);
+}

src/soc/nvidia/tegra132/cbmem.c

@@ -18,9 +18,15 @@
  */
 
 #include <cbmem.h>
+#include <soc/display.h>
+#include <soc/addressmap.h>
+
+#define MTS_SIZE_MB 128
 
 void *cbmem_top(void)
 {
-/* TODO: update with real cbmem_top function. */
-	return NULL;
+	/* FIXME(adurbin): use carveout registers properly. */
+	const uintptr_t reserve = FB_SIZE_MB + MTS_SIZE_MB;
+
+	return (void *)((sdram_max_addressable_mb() - reserve) << 20UL);
 }

src/soc/nvidia/tegra132/include/soc/addressmap.h

@@ -22,6 +22,7 @@
 #define __SOC_NVIDIA_TEGRA132_INCLUDE_SOC_ADDRESS_MAP_H__
 
 #include <stddef.h>
+#include <stdint.h>
 
 enum {
 	TEGRA_SRAM_BASE = 0x40000000,
@@ -80,4 +81,7 @@ enum {
 	TEGRA_I2C_BASE_COUNT = 6,
 };
 
+int sdram_size_mb(void);
+uintptr_t sdram_max_addressable_mb(void);
+
 #endif /* __SOC_NVIDIA_TEGRA132_INCLUDE_SOC_ADDRESS_MAP_H__ */

src/soc/nvidia/tegra132/romstage.c

@@ -19,6 +19,8 @@
 
 #include <arch/stages.h>
 #include <cbfs.h>
+#include <cbmem.h>
+#include <console/cbmem_console.h>
 #include <console/console.h>
 #include <arch/exception.h>
 
@@ -39,6 +41,8 @@ void romstage(void)
 	sdram_init(get_sdram_config());
 	printk(BIOS_INFO, "T132 romstage: sdram_init done\n");
 
+	cbmem_initialize();
+
 	ccplex_cpu_prepare();
 	printk(BIOS_INFO, "T132 romstage: cpu prepare done\n");
 
@@ -48,6 +52,8 @@ void romstage(void)
 	entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA,
 				CONFIG_CBFS_PREFIX "/ramstage");
 
+	cbmemc_reinit();
+
 	ccplex_cpu_start(entry);
 
 	while (1);

src/soc/nvidia/tegra132/sdram.c

@@ -619,29 +619,3 @@ uint32_t sdram_get_ram_code(void)
 		 PMC_STRAPPING_OPT_A_RAM_CODE_MASK) >>
 		PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT);
 }
-
-/* returns total amount of DRAM (in MB) from memory controller registers */
-int sdram_size_mb(void)
-{
-	struct tegra_mc_regs *mc = (struct tegra_mc_regs *)TEGRA_MC_BASE;
-	static int total_size = 0;
-
-	if (total_size)
-		return total_size;
-
-	/*
-	 * This obtains memory size from the External Memory Aperture
-	 * Configuration register. Nvidia confirmed that it is safe to assume
-	 * this value represents the total physical DRAM size.
-	 */
-	total_size = (read32(&mc->emem_cfg) >>
-			MC_EMEM_CFG_SIZE_MB_SHIFT) & MC_EMEM_CFG_SIZE_MB_MASK;
-
-	printk(BIOS_DEBUG, "%s: Total SDRAM (MB): %u\n", __func__, total_size);
-	return total_size;
-}
-
-uintptr_t sdram_max_addressable_mb(void)
-{
-	return MIN((CONFIG_SYS_SDRAM_BASE/MiB) + sdram_size_mb(), 4096);
-}

src/soc/nvidia/tegra132/sdram.h

@@ -24,8 +24,6 @@
 
 uint32_t sdram_get_ram_code(void);
 void sdram_init(const struct sdram_params *param);
-int sdram_size_mb(void);
-uintptr_t sdram_max_addressable_mb(void);
 
 /* Save params to PMC scratch registers for use by BootROM on LP0 resume. */
 void sdram_lp0_save_params(const struct sdram_params *sdram);