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hw/arm_boot.c: Support DTBs which use 64 bit addresses

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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 <peter.maydell@linaro.org>
Reviewed-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
This commit is contained in:
Peter Maydell 2012-07-20 13:34:50 +01:00
parent f0aa713f65
commit 9bfa659e6b
1 changed files with 32 additions and 3 deletions
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35
hw/arm_boot.c
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@ -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");
}