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PPC: bamboo: Use kvm api for freq and clock frequencies

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Now that we have nice and shiny APIs to read out the host's clock and timebase
frequencies, let's use them in the bamboo code as well!

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2011-07-21 02:44:53 +02:00
parent 66ae790247
commit 7dadd40c89
1 changed files with 12 additions and 33 deletions
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45
hw/ppc440_bamboo.c
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@ -31,38 +31,6 @@
#define FDT_ADDR 0x1800000
#define RAMDISK_ADDR 0x1900000
#ifdef CONFIG_FDT
static int bamboo_copy_host_cell(void *fdt, const char *node, const char *prop)
{
uint32_t cell;
int ret;
ret = kvmppc_read_host_property(node, prop, &cell, sizeof(cell));
if (ret < 0) {
fprintf(stderr, "couldn't read host %s/%s\n", node, prop);
goto out;
}
ret = qemu_devtree_setprop_cell(fdt, node, prop, cell);
if (ret < 0) {
fprintf(stderr, "couldn't set guest %s/%s\n", node, prop);
goto out;
}
out:
return ret;
}
static void bamboo_fdt_update(void *fdt)
{
/* Copy data from the host device tree into the guest. Since the guest can
* directly access the timebase without host involvement, we must expose
* the correct frequencies. */
bamboo_copy_host_cell(fdt, "/cpus/cpu@0", "clock-frequency");
bamboo_copy_host_cell(fdt, "/cpus/cpu@0", "timebase-frequency");
}
#endif
static int bamboo_load_device_tree(target_phys_addr_t addr,
uint32_t ramsize,
target_phys_addr_t initrd_base,
@ -75,6 +43,8 @@ static int bamboo_load_device_tree(target_phys_addr_t addr,
char *filename;
int fdt_size;
void *fdt;
uint32_t tb_freq = 400000000;
uint32_t clock_freq = 400000000;
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
if (!filename) {
@ -108,10 +78,19 @@ static int bamboo_load_device_tree(target_phys_addr_t addr,
if (ret < 0)
fprintf(stderr, "couldn't set /chosen/bootargs\n");
/* Copy data from the host device tree into the guest. Since the guest can
* directly access the timebase without host involvement, we must expose
* the correct frequencies. */
if (kvm_enabled()) {
bamboo_fdt_update(fdt);
tb_freq = kvmppc_get_tbfreq();
clock_freq = kvmppc_get_clockfreq();
}
qemu_devtree_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
clock_freq);
qemu_devtree_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
tb_freq);
ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
g_free(fdt);