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authorKumar Gala <galak@kernel.crashing.org>2008-02-14 11:04:23 -0600
committerAndrew Fleming-AFLEMING <afleming@freescale.com>2008-03-26 11:43:03 -0500
commit7aff0c051ad0613171cf2b9941ee48675c62e7cd (patch)
treebc481485ac0659df8512bf02119ca34fb36fe48c /cpu/mpc85xx
parentec2b74ffd36f02c6123725e7c2533dd2deaf4b64 (diff)
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85xx: Added support for multicore boot mechanism
Added the cpu command that provides a generic mechanism to get status, reset, and release secondary cores in multicore processors. Added support for using the ePAPR defined spin-table mechanism on 85xx. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'cpu/mpc85xx')
-rw-r--r--cpu/mpc85xx/fdt.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/cpu/mpc85xx/fdt.c b/cpu/mpc85xx/fdt.c
index 43df1c7..dadda90 100644
--- a/cpu/mpc85xx/fdt.c
+++ b/cpu/mpc85xx/fdt.c
@@ -77,6 +77,55 @@ void ft_fixup_cpu(void *blob, u64 memory_limit)
}
#endif
+#ifdef CONFIG_MP
+#include "mp.h"
+DECLARE_GLOBAL_DATA_PTR;
+
+void ft_fixup_cpu(void *blob, u64 memory_limit)
+{
+ int off;
+ ulong spin_tbl_addr = get_spin_addr();
+ u32 bootpg, id = get_my_id();
+
+ /* if we have 4G or more of memory, put the boot page at 4Gb-4k */
+ if ((u64)gd->ram_size > 0xfffff000)
+ bootpg = 0xfffff000;
+ else
+ bootpg = gd->ram_size - 4096;
+
+ off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
+ while (off != -FDT_ERR_NOTFOUND) {
+ u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", 0);
+
+ if (reg) {
+ if (*reg == id) {
+ fdt_setprop_string(blob, off, "status", "okay");
+ } else {
+ u32 val = *reg * 24 + spin_tbl_addr;
+ val = cpu_to_fdt32(val);
+ fdt_setprop_string(blob, off, "status",
+ "disabled");
+ fdt_setprop_string(blob, off, "enable-method",
+ "spin-table");
+ fdt_setprop(blob, off, "cpu-release-addr",
+ &val, sizeof(val));
+ }
+ } else {
+ printf ("cpu NULL\n");
+ }
+ off = fdt_node_offset_by_prop_value(blob, off,
+ "device_type", "cpu", 4);
+ }
+
+ /* Reserve the boot page so OSes dont use it */
+ if ((u64)bootpg < memory_limit) {
+ off = fdt_add_mem_rsv(blob, bootpg, (u64)4096);
+ if (off < 0)
+ printf("%s: %s\n", __FUNCTION__, fdt_strerror(off));
+ }
+}
+#endif
+
void ft_cpu_setup(void *blob, bd_t *bd)
{
#if defined(CONFIG_HAS_ETH0) || defined(CONFIG_HAS_ETH1) ||\