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armv8: layerscape: Discard the needless cpu nodes 

Using "cpu_pos_mask()" function to detect the real online cpus,
and discard the needless cpu nodes on kernel dts.

Signed-off-by: Wenbin Song <wenbin.song@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Wenbin song 2017-12-04 12:18:29 +08:00 committed by York Sun
parent a8f33034f2
commit 20c7305101
1 changed files with 27 additions and 0 deletions
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27
arch/arm/cpu/armv8/fsl-layerscape/fdt.c
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@ -42,6 +42,33 @@ void ft_fixup_cpu(void *blob)
int addr_cells; int addr_cells;
u64 val, core_id; u64 val, core_id;
size_t *boot_code_size = &(__secondary_boot_code_size); size_t *boot_code_size = &(__secondary_boot_code_size);
u32 mask = cpu_pos_mask();
int off_prev = -1;
off = fdt_path_offset(blob, "/cpus");
if (off < 0) {
puts("couldn't find /cpus node\n");
return;
}
fdt_support_default_count_cells(blob, off, &addr_cells, NULL);
off = fdt_node_offset_by_prop_value(blob, off_prev, "device_type",
"cpu", 4);
while (off != -FDT_ERR_NOTFOUND) {
reg = (fdt32_t *)fdt_getprop(blob, off, "reg", 0);
if (reg) {
core_id = fdt_read_number(reg, addr_cells);
if (!test_bit(id_to_core(core_id), &mask)) {
fdt_del_node(blob, off);
off = off_prev;
}
}
off_prev = off;
off = fdt_node_offset_by_prop_value(blob, off_prev,
"device_type", "cpu", 4);
}
#if defined(CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT) && \ #if defined(CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT) && \
defined(CONFIG_SEC_FIRMWARE_ARMV8_PSCI) defined(CONFIG_SEC_FIRMWARE_ARMV8_PSCI)
int node; int node;