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authorArnab Basu <arnab.basu@freescale.com>2015-01-06 13:18:41 -0800
committerYork Sun <yorksun@freescale.com>2015-02-24 13:08:28 -0800
commit60385d94e56513b50b87724fb9a3878ee5086da9 (patch)
treeed3cfc5ed8010de1ddafbf286d85bf535beda228 /arch/arm/cpu
parent6c747f4ad4eef87152f8d6de2169efe0a6a7a57f (diff)
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ARMv8/fsl-lsch3: Patch cpu node properties in DT for online cores
U-Boot should only add "enable-method" and "cpu-release-address" properties to the "cpu" node of the online cores. Signed-off-by: Arnab Basu <arnab.basu@freescale.com> Signed-off-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'arch/arm/cpu')
-rw-r--r--arch/arm/cpu/armv8/fsl-lsch3/fdt.c23
-rw-r--r--arch/arm/cpu/armv8/fsl-lsch3/mp.c8
-rw-r--r--arch/arm/cpu/armv8/fsl-lsch3/mp.h1
3 files changed, 23 insertions, 9 deletions
diff --git a/arch/arm/cpu/armv8/fsl-lsch3/fdt.c b/arch/arm/cpu/armv8/fsl-lsch3/fdt.c
index e392eb9..2287e26 100644
--- a/arch/arm/cpu/armv8/fsl-lsch3/fdt.c
+++ b/arch/arm/cpu/armv8/fsl-lsch3/fdt.c
@@ -16,7 +16,7 @@ void ft_fixup_cpu(void *blob)
__maybe_unused u64 spin_tbl_addr = (u64)get_spin_tbl_addr();
fdt32_t *reg;
int addr_cells;
- u64 val;
+ u64 val, core_id;
size_t *boot_code_size = &(__secondary_boot_code_size);
off = fdt_path_offset(blob, "/cpus");
@@ -29,15 +29,20 @@ void ft_fixup_cpu(void *blob)
off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
while (off != -FDT_ERR_NOTFOUND) {
reg = (fdt32_t *)fdt_getprop(blob, off, "reg", 0);
+ core_id = of_read_number(reg, addr_cells);
if (reg) {
- val = spin_tbl_addr;
- val += id_to_core(of_read_number(reg, addr_cells))
- * SPIN_TABLE_ELEM_SIZE;
- val = cpu_to_fdt64(val);
- fdt_setprop_string(blob, off, "enable-method",
- "spin-table");
- fdt_setprop(blob, off, "cpu-release-addr",
- &val, sizeof(val));
+ if (core_id == 0 || (is_core_online(core_id))) {
+ val = spin_tbl_addr;
+ val += id_to_core(core_id) *
+ SPIN_TABLE_ELEM_SIZE;
+ val = cpu_to_fdt64(val);
+ fdt_setprop_string(blob, off, "enable-method",
+ "spin-table");
+ fdt_setprop(blob, off, "cpu-release-addr",
+ &val, sizeof(val));
+ } else {
+ debug("skipping offline core\n");
+ }
} else {
puts("Warning: found cpu node without reg property\n");
}
diff --git a/arch/arm/cpu/armv8/fsl-lsch3/mp.c b/arch/arm/cpu/armv8/fsl-lsch3/mp.c
index 94998bf..ce9c0c1 100644
--- a/arch/arm/cpu/armv8/fsl-lsch3/mp.c
+++ b/arch/arm/cpu/armv8/fsl-lsch3/mp.c
@@ -83,6 +83,14 @@ int is_core_valid(unsigned int core)
return !!((1 << core) & cpu_mask());
}
+int is_core_online(u64 cpu_id)
+{
+ u64 *table;
+ int pos = id_to_core(cpu_id);
+ table = (u64 *)get_spin_tbl_addr() + pos * WORDS_PER_SPIN_TABLE_ENTRY;
+ return table[SPIN_TABLE_ELEM_STATUS_IDX] == 1;
+}
+
int cpu_reset(int nr)
{
puts("Feature is not implemented.\n");
diff --git a/arch/arm/cpu/armv8/fsl-lsch3/mp.h b/arch/arm/cpu/armv8/fsl-lsch3/mp.h
index 06ac0bc..66144d6 100644
--- a/arch/arm/cpu/armv8/fsl-lsch3/mp.h
+++ b/arch/arm/cpu/armv8/fsl-lsch3/mp.h
@@ -32,5 +32,6 @@ int fsl_lsch3_wake_seconday_cores(void);
void *get_spin_tbl_addr(void);
phys_addr_t determine_mp_bootpg(void);
void secondary_boot_func(void);
+int is_core_online(u64 cpu_id);
#endif
#endif /* _FSL_CH3_MP_H */