mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 18:11:56 +00:00
powerpc/powernv: Add support for instanciating OPAL v2 from Open Firmware
OPAL v2 is instantiated in a way similar to RTAS using Open Firmware client interface calls, and the resulting address and entry point are put in the device-tree Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
parent
14a43e69ed
commit
6e35d5dac0
@ -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;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user