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-rw-r--r--arch/powerpc/kernel/prom_init.c136
1 files changed, 117 insertions, 19 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index e3f39042721..e96f5d0d2c7 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -140,7 +140,9 @@ struct mem_map_entry {
typedef u32 cell_t;
-extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
+extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7, unsigned long r8,
+ unsigned long r9);
#ifdef CONFIG_PPC64
extern int enter_prom(struct prom_args *args, unsigned long entry);
@@ -1293,6 +1295,11 @@ static int __initdata prom_rtas_start_cpu;
static u64 __initdata prom_rtas_data;
static u64 __initdata prom_rtas_entry;
+#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
+static u64 __initdata prom_opal_base;
+static u64 __initdata prom_opal_entry;
+#endif
+
/* XXX Don't change this structure without updating opal-takeover.S */
static struct opal_secondary_data {
s64 ack; /* 0 */
@@ -1468,6 +1475,76 @@ static void prom_opal_takeover(void)
for (;;)
opal_do_takeover(args);
}
+
+/*
+ * Allocate room for and instantiate OPAL
+ */
+static void __init prom_instantiate_opal(void)
+{
+ phandle opal_node;
+ ihandle opal_inst;
+ u64 base, entry;
+ u64 size = 0, align = 0x10000;
+ u32 rets[2];
+
+ prom_debug("prom_instantiate_opal: start...\n");
+
+ opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal"));
+ prom_debug("opal_node: %x\n", opal_node);
+ if (!PHANDLE_VALID(opal_node))
+ return;
+
+ prom_getprop(opal_node, "opal-runtime-size", &size, sizeof(size));
+ if (size == 0)
+ return;
+ prom_getprop(opal_node, "opal-runtime-alignment", &align,
+ sizeof(align));
+
+ base = alloc_down(size, align, 0);
+ if (base == 0) {
+ prom_printf("OPAL allocation failed !\n");
+ return;
+ }
+
+ opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal"));
+ if (!IHANDLE_VALID(opal_inst)) {
+ prom_printf("opening opal package failed (%x)\n", opal_inst);
+ return;
+ }
+
+ prom_printf("instantiating opal at 0x%x...", base);
+
+ if (call_prom_ret("call-method", 4, 3, rets,
+ ADDR("load-opal-runtime"),
+ opal_inst,
+ base >> 32, base & 0xffffffff) != 0
+ || (rets[0] == 0 && rets[1] == 0)) {
+ prom_printf(" failed\n");
+ return;
+ }
+ entry = (((u64)rets[0]) << 32) | rets[1];
+
+ prom_printf(" done\n");
+
+ reserve_mem(base, size);
+
+ prom_debug("opal base = 0x%x\n", base);
+ prom_debug("opal align = 0x%x\n", align);
+ prom_debug("opal entry = 0x%x\n", entry);
+ prom_debug("opal size = 0x%x\n", (long)size);
+
+ prom_setprop(opal_node, "/ibm,opal", "opal-base-address",
+ &base, sizeof(base));
+ prom_setprop(opal_node, "/ibm,opal", "opal-entry-address",
+ &entry, sizeof(entry));
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
+ RELOC(prom_opal_base) = base;
+ RELOC(prom_opal_entry) = entry;
+#endif
+ prom_debug("prom_instantiate_opal: end...\n");
+}
+
#endif /* CONFIG_PPC_POWERNV */
/*
@@ -1863,7 +1940,7 @@ static int __init prom_find_machine_type(void)
int x;
#endif
- /* Look for a PowerMac */
+ /* Look for a PowerMac or a Cell */
len = prom_getprop(_prom->root, "compatible",
compat, sizeof(compat)-1);
if (len > 0) {
@@ -1889,7 +1966,11 @@ static int __init prom_find_machine_type(void)
}
}
#ifdef CONFIG_PPC64
- /* If not a mac, try to figure out if it's an IBM pSeries or any other
+ /* Try to detect OPAL */
+ if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal"))))
+ return PLATFORM_OPAL;
+
+ /* Try to figure out if it's an IBM pSeries or any other
* PAPR compliant platform. We assume it is if :
* - /device_type is "chrp" (please, do NOT use that for future
* non-IBM designs !
@@ -2116,7 +2197,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
unsigned long soff;
unsigned char *valp;
static char pname[MAX_PROPERTY_NAME];
- int l, room;
+ int l, room, has_phandle = 0;
dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
@@ -2200,19 +2281,26 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
valp = make_room(mem_start, mem_end, l, 4);
call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
*mem_start = _ALIGN(*mem_start, 4);
+
+ if (!strcmp(RELOC(pname), RELOC("phandle")))
+ has_phandle = 1;
}
- /* Add a "linux,phandle" property. */
- soff = dt_find_string(RELOC("linux,phandle"));
- if (soff == 0)
- prom_printf("WARNING: Can't find string index for"
- " <linux-phandle> node %s\n", path);
- else {
- dt_push_token(OF_DT_PROP, mem_start, mem_end);
- dt_push_token(4, mem_start, mem_end);
- dt_push_token(soff, mem_start, mem_end);
- valp = make_room(mem_start, mem_end, 4, 4);
- *(u32 *)valp = node;
+ /* Add a "linux,phandle" property if no "phandle" property already
+ * existed (can happen with OPAL)
+ */
+ if (!has_phandle) {
+ soff = dt_find_string(RELOC("linux,phandle"));
+ if (soff == 0)
+ prom_printf("WARNING: Can't find string index for"
+ " <linux-phandle> node %s\n", path);
+ else {
+ dt_push_token(OF_DT_PROP, mem_start, mem_end);
+ dt_push_token(4, mem_start, mem_end);
+ dt_push_token(soff, mem_start, mem_end);
+ valp = make_room(mem_start, mem_end, 4, 4);
+ *(u32 *)valp = node;
+ }
}
/* do all our children */
@@ -2746,6 +2834,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
* between pSeries SMP and pSeries LPAR
*/
RELOC(of_platform) = prom_find_machine_type();
+ prom_printf("Detected machine type: %x\n", RELOC(of_platform));
#ifndef CONFIG_RELOCATABLE
/* Bail if this is a kdump kernel. */
@@ -2807,7 +2896,8 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
* On non-powermacs, try to instantiate RTAS. PowerMacs don't
* have a usable RTAS implementation.
*/
- if (RELOC(of_platform) != PLATFORM_POWERMAC)
+ if (RELOC(of_platform) != PLATFORM_POWERMAC &&
+ RELOC(of_platform) != PLATFORM_OPAL)
prom_instantiate_rtas();
#ifdef CONFIG_PPC_POWERNV
@@ -2818,7 +2908,8 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
prom_opal_hold_cpus();
prom_opal_takeover();
}
- }
+ } else if (RELOC(of_platform) == PLATFORM_OPAL)
+ prom_instantiate_opal();
#endif
/*
@@ -2826,7 +2917,8 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
*
* PowerMacs use a different mechanism to spin CPUs
*/
- if (RELOC(of_platform) != PLATFORM_POWERMAC)
+ if (RELOC(of_platform) != PLATFORM_POWERMAC &&
+ RELOC(of_platform) != PLATFORM_OPAL)
prom_hold_cpus();
/*
@@ -2894,7 +2986,13 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
reloc_got2(-offset);
#endif
- __start(hdr, kbase, 0);
+#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
+ /* OPAL early debug gets the OPAL base & entry in r8 and r9 */
+ __start(hdr, kbase, 0, 0, 0,
+ RELOC(prom_opal_base), RELOC(prom_opal_entry));
+#else
+ __start(hdr, kbase, 0, 0, 0, 0, 0);
+#endif
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 17:05:10 +0000