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[Qemu-devel] [PATCH v2 5/6] hw/arm_boot.c: Support DTBs which use 64 bit
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH v2 5/6] hw/arm_boot.c: Support DTBs which use 64 bit addresses |
Date: |
Mon, 16 Jul 2012 14:24:15 +0100 |
Support the case where the device tree blob specifies that
#address-cells and #size-cells are greater than 1. (This
is needed for device trees which can handle 64 bit physical
addresses and thus total RAM sizes over 4GB.)
Signed-off-by: Peter Maydell <address@hidden>
Reviewed-by: Peter A. G. Crosthwaite <address@hidden>
---
hw/arm_boot.c | 35 ++++++++++++++++++++++++++++++++---
1 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/hw/arm_boot.c b/hw/arm_boot.c
index af71ed6..a6e9143 100644
--- a/hw/arm_boot.c
+++ b/hw/arm_boot.c
@@ -216,11 +216,12 @@ static void set_kernel_args_old(const struct
arm_boot_info *info)
static int load_dtb(target_phys_addr_t addr, const struct arm_boot_info *binfo)
{
#ifdef CONFIG_FDT
- uint32_t mem_reg_property[] = { cpu_to_be32(binfo->loader_start),
- cpu_to_be32(binfo->ram_size) };
+ uint32_t *mem_reg_property;
+ uint32_t mem_reg_propsize;
void *fdt = NULL;
char *filename;
int size, rc;
+ uint32_t acells, scells, hival;
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, binfo->dtb_filename);
if (!filename) {
@@ -236,8 +237,36 @@ static int load_dtb(target_phys_addr_t addr, const struct
arm_boot_info *binfo)
}
g_free(filename);
+ acells = qemu_devtree_getprop_cell(fdt, "/", "#address-cells");
+ scells = qemu_devtree_getprop_cell(fdt, "/", "#size-cells");
+ if (acells == 0 || scells == 0) {
+ fprintf(stderr, "dtb file invalid (#address-cells or #size-cells
0)\n");
+ return -1;
+ }
+
+ mem_reg_propsize = acells + scells;
+ mem_reg_property = g_new0(uint32_t, mem_reg_propsize);
+ mem_reg_property[acells - 1] = cpu_to_be32(binfo->loader_start);
+ hival = cpu_to_be32(binfo->loader_start >> 32);
+ if (acells > 1) {
+ mem_reg_property[acells - 2] = hival;
+ } else if (hival != 0) {
+ fprintf(stderr, "qemu: dtb file not compatible with "
+ "RAM start address > 4GB\n");
+ exit(1);
+ }
+ mem_reg_property[acells + scells - 1] = cpu_to_be32(binfo->ram_size);
+ hival = cpu_to_be32(binfo->ram_size >> 32);
+ if (scells > 1) {
+ mem_reg_property[acells + scells - 2] = hival;
+ } else if (hival != 0) {
+ fprintf(stderr, "qemu: dtb file not compatible with "
+ "RAM size > 4GB\n");
+ exit(1);
+ }
+
rc = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
- sizeof(mem_reg_property));
+ mem_reg_propsize * sizeof(uint32_t));
if (rc < 0) {
fprintf(stderr, "couldn't set /memory/reg\n");
}
--
1.7.5.4
- [Qemu-devel] [PATCH v2 0/6] arm_boot/vexpress-a15: Support >4GB of RAM, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 6/6] hw/vexpress.c: Allow >4GB of RAM for Cortex-A15 daughterboard, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 1/6] hw/arm_boot.c: Make ram_size a uint64_t, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 4/6] device_tree: Add support for reading device tree properties, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 2/6] hw/arm_boot.c: Consistently use ram_size from arm_boot_info struct, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 3/6] hw/arm_boot.c: Check for RAM sizes exceeding ATAGS capacity, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 5/6] hw/arm_boot.c: Support DTBs which use 64 bit addresses,
Peter Maydell <=