summaryrefslogtreecommitdiff
path: root/src/soc/broadcom/cygnus
diff options
context:
space:
mode:
Diffstat (limited to 'src/soc/broadcom/cygnus')
-rw-r--r--src/soc/broadcom/cygnus/Makefile.inc2
-rw-r--r--src/soc/broadcom/cygnus/include/soc/memlayout.ld1
-rw-r--r--src/soc/broadcom/cygnus/include/soc/sdram.h3
-rw-r--r--src/soc/broadcom/cygnus/romstage.c8
-rw-r--r--src/soc/broadcom/cygnus/sdram.c5
-rw-r--r--src/soc/broadcom/cygnus/soc.c51
6 files changed, 67 insertions, 3 deletions
diff --git a/src/soc/broadcom/cygnus/Makefile.inc b/src/soc/broadcom/cygnus/Makefile.inc
index 6f0c584394..cac9062f76 100644
--- a/src/soc/broadcom/cygnus/Makefile.inc
+++ b/src/soc/broadcom/cygnus/Makefile.inc
@@ -47,6 +47,8 @@ romstage-y += timer.c
ramstage-y += cbmem.c
ramstage-y += i2c.c
+ramstage-y += sdram.c
+ramstage-y += soc.c
ramstage-y += timer.c
ramstage-$(CONFIG_SPI_FLASH) += spi.c
ramstage-$(CONFIG_DRIVERS_UART) += ns16550.c
diff --git a/src/soc/broadcom/cygnus/include/soc/memlayout.ld b/src/soc/broadcom/cygnus/include/soc/memlayout.ld
index 542174bf02..6342810929 100644
--- a/src/soc/broadcom/cygnus/include/soc/memlayout.ld
+++ b/src/soc/broadcom/cygnus/include/soc/memlayout.ld
@@ -42,4 +42,5 @@ SECTIONS
DRAM_START(0x60000000)
RAMSTAGE(0x60000000, 128K)
POSTRAM_CBFS_CACHE(0x60100000, 1M)
+ DMA_COHERENT(0x60200000, 2M)
}
diff --git a/src/soc/broadcom/cygnus/include/soc/sdram.h b/src/soc/broadcom/cygnus/include/soc/sdram.h
index 673d3d4f40..c7d6383e58 100644
--- a/src/soc/broadcom/cygnus/include/soc/sdram.h
+++ b/src/soc/broadcom/cygnus/include/soc/sdram.h
@@ -20,7 +20,10 @@
#ifndef __SOC_BROADCOM_CYGNUS_SDRAM_H__
#define __SOC_BROADCOM_CYGNUS_SDRAM_H__
+#include <stdint.h>
+
void ddr_init2(void);
void sdram_init(void);
+uint32_t sdram_size_mb(void);
#endif /* __SOC_BROADCOM_CYGNUS_SDRAM_H__ */
diff --git a/src/soc/broadcom/cygnus/romstage.c b/src/soc/broadcom/cygnus/romstage.c
index e581a63356..f293f31d2a 100644
--- a/src/soc/broadcom/cygnus/romstage.c
+++ b/src/soc/broadcom/cygnus/romstage.c
@@ -55,9 +55,11 @@ void main(void)
after_dram_time = timestamp_get();
#endif
- mmu_init();
- mmu_config_range(0, 4096, DCACHE_OFF);
- dcache_mmu_enable();
+ /* Now that DRAM is up, add mappings for it and DMA coherency buffer. */
+ mmu_config_range((uintptr_t)_dram/MiB,
+ sdram_size_mb(), DCACHE_WRITEBACK);
+ mmu_config_range((uintptr_t)_dma_coherent/MiB,
+ _dma_coherent_size/MiB, DCACHE_OFF);
cbmem_initialize_empty();
diff --git a/src/soc/broadcom/cygnus/sdram.c b/src/soc/broadcom/cygnus/sdram.c
index 1642842e0c..bab126d66c 100644
--- a/src/soc/broadcom/cygnus/sdram.c
+++ b/src/soc/broadcom/cygnus/sdram.c
@@ -60,3 +60,8 @@ void sdram_init(void)
test_ddr();
}
+
+uint32_t sdram_size_mb(void)
+{
+ return CONFIG_DRAM_SIZE_MB;
+}
diff --git a/src/soc/broadcom/cygnus/soc.c b/src/soc/broadcom/cygnus/soc.c
new file mode 100644
index 0000000000..c9597f2b08
--- /dev/null
+++ b/src/soc/broadcom/cygnus/soc.c
@@ -0,0 +1,51 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 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 <device/device.h>
+#include <soc/sdram.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <symbols.h>
+
+static void soc_init(device_t dev)
+{
+ ram_resource(dev, 0, (uintptr_t)_dram/KiB, sdram_size_mb()*(MiB/KiB));
+}
+
+static void soc_noop(device_t dev)
+{
+}
+
+static struct device_operations soc_ops = {
+ .read_resources = soc_noop,
+ .set_resources = soc_noop,
+ .enable_resources = soc_noop,
+ .init = soc_init,
+ .scan_bus = 0,
+};
+
+static void enable_cygnus_dev(device_t dev)
+{
+ dev->ops = &soc_ops;
+}
+
+struct chip_operations soc_broadcom_cygnus_ops = {
+ CHIP_NAME("SOC Broadcom Cygnus")
+ .enable_dev = enable_cygnus_dev,
+};