@@ -22,6 +22,7 @@ endif
ifneq ($(CONFIG_ARMV7_NONSEC)$(CONFIG_ARMV7_VIRT),)
obj-y += nonsec_virt.o
obj-y += virt-v7.o
+obj-y += virt-dt.o
endif
ifneq ($(CONFIG_ARMV7_PSCI),)
new file mode 100644
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2013 - ARM Ltd
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <common.h>
+#include <stdio_dev.h>
+#include <linux/ctype.h>
+#include <linux/types.h>
+#include <asm/global_data.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+#include <asm/armv7.h>
+#include <asm/psci.h>
+
+static int fdt_psci(void *fdt)
+{
+#ifdef CONFIG_ARMV7_PSCI
+ int nodeoff;
+ int tmp;
+
+ nodeoff = fdt_path_offset(fdt, "/cpus");
+ if (nodeoff < 0) {
+ printf("couldn't find /cpus\n");
+ return nodeoff;
+ }
+
+ /* add 'enable-method = "psci"' to each cpu node */
+ for (tmp = fdt_first_subnode(fdt, nodeoff);
+ tmp >= 0;
+ tmp = fdt_next_subnode(fdt, tmp)) {
+ const struct fdt_property *prop;
+ int len;
+
+ prop = fdt_get_property(fdt, tmp, "device_type", &len);
+ if (!prop)
+ continue;
+ if (len < 4)
+ continue;
+ if (strcmp(prop->data, "cpu"))
+ continue;
+
+ fdt_setprop_string(fdt, tmp, "enable-method", "psci");
+ }
+
+ nodeoff = fdt_path_offset(fdt, "/psci");
+ if (nodeoff < 0) {
+ nodeoff = fdt_path_offset(fdt, "/");
+ if (nodeoff < 0)
+ return nodeoff;
+
+ nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
+ if (nodeoff < 0)
+ return nodeoff;
+ }
+
+ tmp = fdt_setprop_string(fdt, nodeoff, "compatible", "arm,psci");
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_suspend", ARM_PSCI_FN_CPU_SUSPEND);
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_off", ARM_PSCI_FN_CPU_OFF);
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_on", ARM_PSCI_FN_CPU_ON);
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_u32(fdt, nodeoff, "migrate", ARM_PSCI_FN_MIGRATE);
+ if (tmp)
+ return tmp;
+#endif
+ return 0;
+}
+
+int armv7_update_dt(void *fdt)
+{
+#ifndef CONFIG_ARMV7_SECURE_BASE
+ /* secure code lives in RAM, keep it alive */
+ fdt_add_mem_rsv(fdt, (unsigned long)__secure_start,
+ __secure_end - __secure_start);
+#endif
+
+ return fdt_psci(fdt);
+}
@@ -79,6 +79,7 @@ void v7_outer_cache_inval_range(u32 start, u32 end);
#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
int armv7_init_nonsec(void);
+int armv7_update_dt(void *fdt);
/* defined in assembly file */
unsigned int _nonsec_init(void);
@@ -17,13 +17,14 @@
#include <common.h>
#include <fdt_support.h>
+#include <asm/armv7.h>
DECLARE_GLOBAL_DATA_PTR;
int arch_fixup_fdt(void *blob)
{
bd_t *bd = gd->bd;
- int bank;
+ int bank, ret;
u64 start[CONFIG_NR_DRAM_BANKS];
u64 size[CONFIG_NR_DRAM_BANKS];
@@ -32,5 +33,11 @@ int arch_fixup_fdt(void *blob)
size[bank] = bd->bi_dram[bank].size;
}
- return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
+ ret = fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
+ if (ret)
+ return ret;
+
+#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
+ return armv7_update_dt(blob);
+#endif
}
Generate the PSCI node in the device tree. Also add a reserve section for the "secure" code that lives in in normal RAM, so that the kernel knows it'd better not trip on it. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- arch/arm/cpu/armv7/Makefile | 1 + arch/arm/cpu/armv7/virt-dt.c | 100 +++++++++++++++++++++++++++++++++++++++++++ arch/arm/include/asm/armv7.h | 1 + arch/arm/lib/bootm-fdt.c | 11 ++++- 4 files changed, 111 insertions(+), 2 deletions(-) create mode 100644 arch/arm/cpu/armv7/virt-dt.c