static u64 __initdata prom_opal_entry;
#endif
-#ifdef __BIG_ENDIAN__
-/* XXX Don't change this structure without updating opal-takeover.S */
-static struct opal_secondary_data {
- s64 ack; /* 0 */
- u64 go; /* 8 */
- struct opal_takeover_args args; /* 16 */
-} opal_secondary_data;
-
-static u64 __initdata prom_opal_align;
-static u64 __initdata prom_opal_size;
-static int __initdata prom_rtas_start_cpu;
-static u64 __initdata prom_rtas_data;
-static u64 __initdata prom_rtas_entry;
-
-extern char opal_secondary_entry;
-
-static void __init prom_query_opal(void)
-{
- long rc;
-
- /* We must not query for OPAL presence on a machine that
- * supports TNK takeover (970 blades), as this uses the same
- * h-call with different arguments and will crash
- */
- if (PHANDLE_VALID(call_prom("finddevice", 1, 1,
- ADDR("/tnk-memory-map")))) {
- prom_printf("TNK takeover detected, skipping OPAL check\n");
- return;
- }
-
- prom_printf("Querying for OPAL presence... ");
-
- rc = opal_query_takeover(&prom_opal_size,
- &prom_opal_align);
- prom_debug("(rc = %ld) ", rc);
- if (rc != 0) {
- prom_printf("not there.\n");
- return;
- }
- of_platform = PLATFORM_OPAL;
- prom_printf(" there !\n");
- prom_debug(" opal_size = 0x%lx\n", prom_opal_size);
- prom_debug(" opal_align = 0x%lx\n", prom_opal_align);
- if (prom_opal_align < 0x10000)
- prom_opal_align = 0x10000;
-}
-
-static int __init prom_rtas_call(int token, int nargs, int nret,
- int *outputs, ...)
-{
- struct rtas_args rtas_args;
- va_list list;
- int i;
-
- rtas_args.token = token;
- rtas_args.nargs = nargs;
- rtas_args.nret = nret;
- rtas_args.rets = (rtas_arg_t *)&(rtas_args.args[nargs]);
- va_start(list, outputs);
- for (i = 0; i < nargs; ++i)
- rtas_args.args[i] = va_arg(list, rtas_arg_t);
- va_end(list);
-
- for (i = 0; i < nret; ++i)
- rtas_args.rets[i] = 0;
-
- opal_enter_rtas(&rtas_args, prom_rtas_data,
- prom_rtas_entry);
-
- if (nret > 1 && outputs != NULL)
- for (i = 0; i < nret-1; ++i)
- outputs[i] = rtas_args.rets[i+1];
- return (nret > 0)? rtas_args.rets[0]: 0;
-}
-
-static void __init prom_opal_hold_cpus(void)
-{
- int i, cnt, cpu, rc;
- long j;
- phandle node;
- char type[64];
- u32 servers[8];
- void *entry = (unsigned long *)&opal_secondary_entry;
- struct opal_secondary_data *data = &opal_secondary_data;
-
- prom_debug("prom_opal_hold_cpus: start...\n");
- prom_debug(" - entry = 0x%x\n", entry);
- prom_debug(" - data = 0x%x\n", data);
-
- data->ack = -1;
- data->go = 0;
-
- /* look for cpus */
- for (node = 0; prom_next_node(&node); ) {
- type[0] = 0;
- prom_getprop(node, "device_type", type, sizeof(type));
- if (strcmp(type, "cpu") != 0)
- continue;
-
- /* Skip non-configured cpus. */
- if (prom_getprop(node, "status", type, sizeof(type)) > 0)
- if (strcmp(type, "okay") != 0)
- continue;
-
- cnt = prom_getprop(node, "ibm,ppc-interrupt-server#s", servers,
- sizeof(servers));
- if (cnt == PROM_ERROR)
- break;
- cnt >>= 2;
- for (i = 0; i < cnt; i++) {
- cpu = servers[i];
- prom_debug("CPU %d ... ", cpu);
- if (cpu == prom.cpu) {
- prom_debug("booted !\n");
- continue;
- }
- prom_debug("starting ... ");
-
- /* Init the acknowledge var which will be reset by
- * the secondary cpu when it awakens from its OF
- * spinloop.
- */
- data->ack = -1;
- rc = prom_rtas_call(prom_rtas_start_cpu, 3, 1,
- NULL, cpu, entry, data);
- prom_debug("rtas rc=%d ...", rc);
-
- for (j = 0; j < 100000000 && data->ack == -1; j++) {
- HMT_low();
- mb();
- }
- HMT_medium();
- if (data->ack != -1)
- prom_debug("done, PIR=0x%x\n", data->ack);
- else
- prom_debug("timeout !\n");
- }
- }
- prom_debug("prom_opal_hold_cpus: end...\n");
-}
-
-static void __init prom_opal_takeover(void)
-{
- struct opal_secondary_data *data = &opal_secondary_data;
- struct opal_takeover_args *args = &data->args;
- u64 align = prom_opal_align;
- u64 top_addr, opal_addr;
-
- args->k_image = (u64)_stext;
- args->k_size = _end - _stext;
- args->k_entry = 0;
- args->k_entry2 = 0x60;
-
- top_addr = _ALIGN_UP(args->k_size, align);
-
- if (prom_initrd_start != 0) {
- args->rd_image = prom_initrd_start;
- args->rd_size = prom_initrd_end - args->rd_image;
- args->rd_loc = top_addr;
- top_addr = _ALIGN_UP(args->rd_loc + args->rd_size, align);
- }
-
- /* Pickup an address for the HAL. We want to go really high
- * up to avoid problem with future kexecs. On the other hand
- * we don't want to be all over the TCEs on P5IOC2 machines
- * which are going to be up there too. We assume the machine
- * has plenty of memory, and we ask for the HAL for now to
- * be just below the 1G point, or above the initrd
- */
- opal_addr = _ALIGN_DOWN(0x40000000 - prom_opal_size, align);
- if (opal_addr < top_addr)
- opal_addr = top_addr;
- args->hal_addr = opal_addr;
-
- /* Copy the command line to the kernel image */
- strlcpy(boot_command_line, prom_cmd_line,
- COMMAND_LINE_SIZE);
-
- prom_debug(" k_image = 0x%lx\n", args->k_image);
- prom_debug(" k_size = 0x%lx\n", args->k_size);
- prom_debug(" k_entry = 0x%lx\n", args->k_entry);
- prom_debug(" k_entry2 = 0x%lx\n", args->k_entry2);
- prom_debug(" hal_addr = 0x%lx\n", args->hal_addr);
- prom_debug(" rd_image = 0x%lx\n", args->rd_image);
- prom_debug(" rd_size = 0x%lx\n", args->rd_size);
- prom_debug(" rd_loc = 0x%lx\n", args->rd_loc);
- prom_printf("Performing OPAL takeover,this can take a few minutes..\n");
- prom_close_stdin();
- mb();
- data->go = 1;
- for (;;)
- opal_do_takeover(args);
-}
-#endif /* __BIG_ENDIAN__ */
-
/*
* Allocate room for and instantiate OPAL
*/
&val, sizeof(val)) != PROM_ERROR)
rtas_has_query_cpu_stopped = true;
-#if defined(CONFIG_PPC_POWERNV) && defined(__BIG_ENDIAN__)
- /* PowerVN takeover hack */
- prom_rtas_data = base;
- prom_rtas_entry = entry;
- prom_getprop(rtas_node, "start-cpu", &prom_rtas_start_cpu, 4);
-#endif
prom_debug("rtas base = 0x%x\n", base);
prom_debug("rtas entry = 0x%x\n", entry);
prom_debug("rtas size = 0x%x\n", (long)size);
prom_instantiate_rtas();
#ifdef CONFIG_PPC_POWERNV
-#ifdef __BIG_ENDIAN__
- /* Detect HAL and try instanciating it & doing takeover */
- if (of_platform == PLATFORM_PSERIES_LPAR) {
- prom_query_opal();
- if (of_platform == PLATFORM_OPAL) {
- prom_opal_hold_cpus();
- prom_opal_takeover();
- }
- } else
-#endif /* __BIG_ENDIAN__ */
if (of_platform == PLATFORM_OPAL)
prom_instantiate_opal();
#endif /* CONFIG_PPC_POWERNV */
+++ /dev/null
-/*
- * PowerNV OPAL takeover assembly code, for use by prom_init.c
- *
- * Copyright 2011 IBM Corp.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <asm/ppc_asm.h>
-#include <asm/hvcall.h>
-#include <asm/asm-offsets.h>
-#include <asm/opal.h>
-
-#define H_HAL_TAKEOVER 0x5124
-#define H_HAL_TAKEOVER_QUERY_MAGIC -1
-
- .text
-_GLOBAL(opal_query_takeover)
- mfcr r0
- stw r0,8(r1)
- stdu r1,-STACKFRAMESIZE(r1)
- std r3,STK_PARAM(R3)(r1)
- std r4,STK_PARAM(R4)(r1)
- li r3,H_HAL_TAKEOVER
- li r4,H_HAL_TAKEOVER_QUERY_MAGIC
- HVSC
- addi r1,r1,STACKFRAMESIZE
- ld r10,STK_PARAM(R3)(r1)
- std r4,0(r10)
- ld r10,STK_PARAM(R4)(r1)
- std r5,0(r10)
- lwz r0,8(r1)
- mtcrf 0xff,r0
- blr
-
-_GLOBAL(opal_do_takeover)
- mfcr r0
- stw r0,8(r1)
- mflr r0
- std r0,16(r1)
- bl __opal_do_takeover
- ld r0,16(r1)
- mtlr r0
- lwz r0,8(r1)
- mtcrf 0xff,r0
- blr
-
-__opal_do_takeover:
- ld r4,0(r3)
- ld r5,0x8(r3)
- ld r6,0x10(r3)
- ld r7,0x18(r3)
- ld r8,0x20(r3)
- ld r9,0x28(r3)
- ld r10,0x30(r3)
- ld r11,0x38(r3)
- li r3,H_HAL_TAKEOVER
- HVSC
- blr
-
- .globl opal_secondary_entry
-opal_secondary_entry:
- mr r31,r3
- mfmsr r11
- li r12,(MSR_SF | MSR_ISF)@highest
- sldi r12,r12,48
- or r11,r11,r12
- mtmsrd r11
- isync
- mfspr r4,SPRN_PIR
- std r4,0(r3)
-1: HMT_LOW
- ld r4,8(r3)
- cmpli cr0,r4,0
- beq 1b
- HMT_MEDIUM
-1: addi r3,r31,16
- bl __opal_do_takeover
- b 1b
-
-_GLOBAL(opal_enter_rtas)
- mflr r0
- std r0,16(r1)
- stdu r1,-PROM_FRAME_SIZE(r1) /* Save SP and create stack space */
-
- /* Because PROM is running in 32b mode, it clobbers the high order half
- * of all registers that it saves. We therefore save those registers
- * PROM might touch to the stack. (r0, r3-r13 are caller saved)
- */
- SAVE_GPR(2, r1)
- SAVE_GPR(13, r1)
- SAVE_8GPRS(14, r1)
- SAVE_10GPRS(22, r1)
- mfcr r10
- mfmsr r11
- std r10,_CCR(r1)
- std r11,_MSR(r1)
-
- /* Get the PROM entrypoint */
- mtlr r5
-
- /* Switch MSR to 32 bits mode
- */
- li r12,1
- rldicr r12,r12,MSR_SF_LG,(63-MSR_SF_LG)
- andc r11,r11,r12
- li r12,1
- rldicr r12,r12,MSR_ISF_LG,(63-MSR_ISF_LG)
- andc r11,r11,r12
- mtmsrd r11
- isync
-
- /* Enter RTAS here... */
- blrl
-
- /* Just make sure that r1 top 32 bits didn't get
- * corrupt by OF
- */
- rldicl r1,r1,0,32
-
- /* Restore the MSR (back to 64 bits) */
- ld r0,_MSR(r1)
- MTMSRD(r0)
- isync
-
- /* Restore other registers */
- REST_GPR(2, r1)
- REST_GPR(13, r1)
- REST_8GPRS(14, r1)
- REST_10GPRS(22, r1)
- ld r4,_CCR(r1)
- mtcr r4
-
- addi r1,r1,PROM_FRAME_SIZE
- ld r0,16(r1)
- mtlr r0
- blr
projects / users / willy / pagecache.git / commitdiff