[coreboot-gerrit] New patch to review for coreboot: a11959f tegra132: initialize GIC
Patrick Georgi (pgeorgi@google.com)
gerrit at coreboot.org
Thu Mar 26 10:38:40 CET 2015
Patrick Georgi (pgeorgi at google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8995
-gerrit
commit a11959f11b35e75c4977e7b5c3b61d996931121b
Author: Aaron Durbin <adurbin at chromium.org>
Date: Tue Aug 19 15:34:51 2014 -0500
tegra132: initialize GIC
This provides are barebones initialization for tegra132 GIC
on CPU0. It routes all interrupts to CPU0, moves them all
into group 1, and attempts to allow non-secure access for
all registers (doesn't appear to be implemented, though).
BUG=chrome-os-partner:31449
BRANCH=None
TEST=Built and booted past smp init in the kernel. Timers
appear to be flowing now since jiffies are updated.
Change-Id: Id45c13cc23e50feed3d88da13420c9eb694498a0
Signed-off-by: Patrick Georgi <pgeorgi at chromium.org>
Original-Commit-Id: 81bad0a53083baa7af0f1fd5f82fef0538ee62df
Original-Change-Id: I69dd9ae53f259e876a9bc4b9d7f65330150d2990
Original-Signed-off-by: Aaron Durbin <adurbin at chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/212795
Original-Reviewed-by: Furquan Shaikh <furquan at chromium.org>
---
src/soc/nvidia/tegra132/Makefile.inc | 1 +
src/soc/nvidia/tegra132/gic.c | 117 +++++++++++++++++++++++
src/soc/nvidia/tegra132/include/soc/addressmap.h | 2 +
src/soc/nvidia/tegra132/include/soc/ramstage.h | 26 +++++
src/soc/nvidia/tegra132/soc.c | 2 +
5 files changed, 148 insertions(+)
diff --git a/src/soc/nvidia/tegra132/Makefile.inc b/src/soc/nvidia/tegra132/Makefile.inc
index fb9b033..b489d52 100644
--- a/src/soc/nvidia/tegra132/Makefile.inc
+++ b/src/soc/nvidia/tegra132/Makefile.inc
@@ -54,6 +54,7 @@ ramstage-y += soc.c
ramstage-y += spi.c
ramstage-y += i2c.c
ramstage-y += dma.c
+ramstage-y += gic.c
ramstage-y += monotonic_timer.c
ramstage-y += padconfig.c
ramstage-y += funitcfg.c
diff --git a/src/soc/nvidia/tegra132/gic.c b/src/soc/nvidia/tegra132/gic.c
new file mode 100644
index 0000000..95b592f
--- /dev/null
+++ b/src/soc/nvidia/tegra132/gic.c
@@ -0,0 +1,117 @@
+/*
+ * 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 <stdint.h>
+#include <console/console.h>
+#include <soc/addressmap.h>
+#include <soc/ramstage.h>
+
+enum {
+ GICD_CTLR = 0x0,
+ ENABLE_GRP0 = 0x1 << 0,
+ ENABLE_GRP1 = 0x1 << 1,
+ GICD_TYPER = 0x4,
+ GICD_ITARGETSR = 0x800,
+ GICD_IGROUPR = 0x80,
+ GICD_NSACR = 0xe00,
+
+ GICC_CTLR = 0x0,
+ GICC_PMR = 0x4,
+};
+
+struct gicd {
+ uint32_t *base;
+ size_t num_interrupts;
+};
+
+static inline uint32_t gic_read(uint32_t *base, size_t byte_offset)
+{
+ return read32(&base[byte_offset / sizeof(uint32_t)]);
+}
+
+static inline void gic_write(uint32_t *base, size_t byte_offset, uint32_t val)
+{
+ write32(val, &base[byte_offset / sizeof(uint32_t)]);
+}
+
+static inline uint32_t gicd_read(struct gicd *gicd, size_t byte_offset)
+{
+ return gic_read(gicd->base, byte_offset);
+}
+
+static inline void gicd_write(struct gicd *gicd, size_t byte_offset,
+ uint32_t val)
+{
+ gic_write(gicd->base, byte_offset, val);
+}
+
+static void gic_write_regs(uint32_t *base, size_t offset,
+ size_t tot_interrupts,
+ size_t interrupts_per_reg, uint32_t val)
+{
+ size_t i;
+ size_t bound = sizeof(uint32_t) * tot_interrupts / interrupts_per_reg;
+
+ for (i = 0; i < bound; i += sizeof(uint32_t))
+ gic_write(base, offset + i, val);
+}
+
+static void gicd_write_regs(struct gicd *gicd, size_t offset,
+ size_t interrupts_per_reg, uint32_t val)
+{
+ gic_write_regs(gicd->base, offset, gicd->num_interrupts,
+ interrupts_per_reg, val);
+}
+
+static void gicd_init(struct gicd *gicd, uintptr_t base)
+{
+ uint32_t typer;
+
+ gicd->base = (void *)base;
+
+ typer = gicd_read(gicd, GICD_TYPER);
+
+ gicd->num_interrupts = 32 * ((typer & 0x1f) + 1);
+
+ printk(BIOS_DEBUG, "GICD at %p. TYPER=%08x, %zu interrupts.\n",
+ gicd->base, typer, gicd->num_interrupts);
+}
+
+void gic_init(void)
+{
+ struct gicd gicd;
+ uint32_t * const gicc = (void *)(uintptr_t)TEGRA_GICC_BASE;
+
+ gicd_init(&gicd, TEGRA_GICD_BASE);
+
+ /* Enable Group 0 and Group 1 */
+ gicd_write(&gicd, GICD_CTLR, ENABLE_GRP0 | ENABLE_GRP1);
+
+ /* Enable Group 0 and Group 1 in GICC and enable all priroity levels. */
+ gic_write(gicc, GICC_CTLR, ENABLE_GRP0 | ENABLE_GRP1);
+ gic_write(gicc, GICC_PMR, 1 << 7);
+
+ /* All interrupts route go to CPU 0. */
+ gicd_write_regs(&gicd, GICD_ITARGETSR, 4, 0x01010101);
+ /* Put all interrupts into Gropup 1. */
+ gicd_write_regs(&gicd, GICD_IGROUPR, 32, 0xffffffff);
+ /* Allow Non-secure access to everything. */
+ gicd_write_regs(&gicd, GICD_NSACR, 16, 0xffffffff);
+}
diff --git a/src/soc/nvidia/tegra132/include/soc/addressmap.h b/src/soc/nvidia/tegra132/include/soc/addressmap.h
index 732c9e9..ebe50f5 100644
--- a/src/soc/nvidia/tegra132/include/soc/addressmap.h
+++ b/src/soc/nvidia/tegra132/include/soc/addressmap.h
@@ -31,6 +31,8 @@ enum {
enum {
TEGRA_ARM_PERIPHBASE = 0x50040000,
+ TEGRA_GICD_BASE = 0x50041000,
+ TEGRA_GICC_BASE = 0x50042000,
TEGRA_ARM_DISPLAYA = 0x54200000,
TEGRA_ARM_DISPLAYB = 0x54240000,
TEGRA_ARM_SOR = 0x54540000,
diff --git a/src/soc/nvidia/tegra132/include/soc/ramstage.h b/src/soc/nvidia/tegra132/include/soc/ramstage.h
new file mode 100644
index 0000000..e42f56d
--- /dev/null
+++ b/src/soc/nvidia/tegra132/include/soc/ramstage.h
@@ -0,0 +1,26 @@
+/*
+ * 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
+ */
+
+#ifndef __SOC_NVIDIA_TEGRA132_SOC_RAMSTAGE_H__
+#define __SOC_NVIDIA_TEGRA132_SOC_RAMSTAGE_H__
+
+void gic_init(void);
+
+#endif /* __SOC_NVIDIA_TEGRA132_SOC_RAMSTAGE_H__ */
+
diff --git a/src/soc/nvidia/tegra132/soc.c b/src/soc/nvidia/tegra132/soc.c
index 276ea7b..13050f6 100644
--- a/src/soc/nvidia/tegra132/soc.c
+++ b/src/soc/nvidia/tegra132/soc.c
@@ -24,6 +24,7 @@
#include <vendorcode/google/chromeos/chromeos.h>
#include <soc/addressmap.h>
#include <soc/clock.h>
+#include <soc/ramstage.h>
#include <soc/nvidia/tegra/apbmisc.h>
static void soc_read_resources(device_t dev)
@@ -59,6 +60,7 @@ static void soc_init(device_t dev)
{
printk(BIOS_INFO, "CPU: Tegra132\n");
clock_init_arm_generic_timer();
+ gic_init();
}
static void soc_noop(device_t dev)
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