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armv8/fsl-lsch3: Release secondary cores from boot hold off with Boot Page

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Secondary cores need to be released from holdoff by boot release
registers. With GPP bootrom, they can boot from main memory
directly. Individual spin table is used for each core. Spin table
and the boot page is reserved in device tree so OS won't overwrite.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Arnab Basu <arnab.basu@freescale.com>
This commit is contained in:
York Sun 2014-09-08 12:20:00 -07:00
parent f43b4356a7
commit 40f8dec54d
12 changed files with 521 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/cpu/armv8/fsl-lsch3/Makefile
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@ -7,3 +7,5 @@
obj-y += cpu.o
obj-y += lowlevel.o
obj-y += speed.o
obj-$(CONFIG_MP) += mp.o
obj-$(CONFIG_OF_LIBFDT) += fdt.o

13
arch/arm/cpu/armv8/fsl-lsch3/cpu.c
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@ -11,6 +11,7 @@
#include <asm/io.h>
#include <asm/arch-fsl-lsch3/immap_lsch3.h>
#include "cpu.h"
#include "mp.h"
#include "speed.h"
#include <fsl_mc.h>
@ -434,3 +435,15 @@ int cpu_eth_init(bd_t *bis)
#endif
return error;
}
int arch_early_init_r(void)
{
int rv;
rv = fsl_lsch3_wake_seconday_cores();
if (rv)
printf("Did not wake secondary cores\n");
return 0;
}

1
arch/arm/cpu/armv8/fsl-lsch3/cpu.h
View File

@ -5,3 +5,4 @@
*/
int fsl_qoriq_core_to_cluster(unsigned int core);
u32 cpu_mask(void);

58
arch/arm/cpu/armv8/fsl-lsch3/fdt.c Normal file
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@ -0,0 +1,58 @@
/*
* Copyright 2014 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <libfdt.h>
#include <fdt_support.h>
#include "mp.h"
#ifdef CONFIG_MP
void ft_fixup_cpu(void *blob)
{
int off;
__maybe_unused u64 spin_tbl_addr = (u64)get_spin_tbl_addr();
fdt32_t *reg;
int addr_cells;
u64 val;
size_t *boot_code_size = &(__secondary_boot_code_size);
off = fdt_path_offset(blob, "/cpus");
if (off < 0) {
puts("couldn't find /cpus node\n");
return;
}
of_bus_default_count_cells(blob, off, &addr_cells, NULL);
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);
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));
} else {
puts("Warning: found cpu node without reg property\n");
}
off = fdt_node_offset_by_prop_value(blob, off, "device_type",
"cpu", 4);
}
fdt_add_mem_rsv(blob, (uintptr_t)&secondary_boot_code,
*boot_code_size);
}
#endif
void ft_cpu_setup(void *blob, bd_t *bd)
{
#ifdef CONFIG_MP
ft_fixup_cpu(blob);
#endif
}

131
arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S
View File

@ -8,7 +8,9 @@
#include <config.h>
#include <linux/linkage.h>
#include <asm/gic.h>
#include <asm/macro.h>
#include "mp.h"
ENTRY(lowlevel_init)
mov x29, lr /* Save LR */
@ -35,31 +37,114 @@ ENTRY(lowlevel_init)
#endif
#endif
branch_if_master x0, x1, 1f
branch_if_master x0, x1, 2f
/*
* Slave should wait for master clearing spin table.
* This sync prevent salves observing incorrect
* value of spin table and jumping to wrong place.
*/
#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
#ifdef CONFIG_GICV2
ldr x0, =GICC_BASE
#endif
bl gic_wait_for_interrupt
#endif
/*
* All processors will enter EL2 and optionally EL1.
*/
bl armv8_switch_to_el2
#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
bl armv8_switch_to_el1
#endif
b 2f
1:
ldr x0, =secondary_boot_func
blr x0
2:
mov lr, x29 /* Restore LR */
ret
ENDPROC(lowlevel_init)
/* Keep literals not used by the secondary boot code outside it */
.ltorg
/* Using 64 bit alignment since the spin table is accessed as data */
.align 4
.global secondary_boot_code
/* Secondary Boot Code starts here */
secondary_boot_code:
.global __spin_table
__spin_table:
.space CONFIG_MAX_CPUS*SPIN_TABLE_ELEM_SIZE
.align 2
ENTRY(secondary_boot_func)
/*
* MPIDR_EL1 Fields:
* MPIDR[1:0] = AFF0_CPUID <- Core ID (0,1)
* MPIDR[7:2] = AFF0_RES
* MPIDR[15:8] = AFF1_CLUSTERID <- Cluster ID (0,1,2,3)
* MPIDR[23:16] = AFF2_CLUSTERID
* MPIDR[24] = MT
* MPIDR[29:25] = RES0
* MPIDR[30] = U
* MPIDR[31] = ME
* MPIDR[39:32] = AFF3
*
* Linear Processor ID (LPID) calculation from MPIDR_EL1:
* (We only use AFF0_CPUID and AFF1_CLUSTERID for now
* until AFF2_CLUSTERID and AFF3 have non-zero values)
*
* LPID = MPIDR[15:8] | MPIDR[1:0]
*/
mrs x0, mpidr_el1
ubfm x1, x0, #8, #15
ubfm x2, x0, #0, #1
orr x10, x2, x1, lsl #2 /* x10 has LPID */
ubfm x9, x0, #0, #15 /* x9 contains MPIDR[15:0] */
/*
* offset of the spin table element for this core from start of spin
* table (each elem is padded to 64 bytes)
*/
lsl x1, x10, #6
ldr x0, =__spin_table
/* physical address of this cpus spin table element */
add x11, x1, x0
str x9, [x11, #16] /* LPID */
mov x4, #1
str x4, [x11, #8] /* STATUS */
dsb sy
#if defined(CONFIG_GICV3)
gic_wait_for_interrupt_m x0
#elif defined(CONFIG_GICV2)
ldr x0, =GICC_BASE
gic_wait_for_interrupt_m x0, w1
#endif
bl secondary_switch_to_el2
#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
bl secondary_switch_to_el1
#endif
slave_cpu:
wfe
ldr x0, [x11]
cbz x0, slave_cpu
#ifndef CONFIG_ARMV8_SWITCH_TO_EL1
mrs x1, sctlr_el2
#else
mrs x1, sctlr_el1
#endif
tbz x1, #25, cpu_is_le
rev x0, x0 /* BE to LE conversion */
cpu_is_le:
br x0 /* branch to the given address */
ENDPROC(secondary_boot_func)
ENTRY(secondary_switch_to_el2)
switch_el x0, 1f, 0f, 0f
0: ret
1: armv8_switch_to_el2_m x0
ENDPROC(secondary_switch_to_el2)
ENTRY(secondary_switch_to_el1)
switch_el x0, 0f, 1f, 0f
0: ret
1: armv8_switch_to_el1_m x0, x1
ENDPROC(secondary_switch_to_el1)
/* Ensure that the literals used by the secondary boot code are
* assembled within it (this is required so that we can protect
* this area with a single memreserve region
*/
.ltorg
/* 64 bit alignment for elements accessed as data */
.align 4
.globl __secondary_boot_code_size
.type __secondary_boot_code_size, %object
/* Secondary Boot Code ends here */
__secondary_boot_code_size:
.quad .-secondary_boot_code

168
arch/arm/cpu/armv8/fsl-lsch3/mp.c Normal file
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@ -0,0 +1,168 @@
/*
* Copyright 2014 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/arch-fsl-lsch3/immap_lsch3.h>
#include "mp.h"
DECLARE_GLOBAL_DATA_PTR;
void *get_spin_tbl_addr(void)
{
return &__spin_table;
}
phys_addr_t determine_mp_bootpg(void)
{
return (phys_addr_t)&secondary_boot_code;
}
int fsl_lsch3_wake_seconday_cores(void)
{
struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
struct ccsr_reset __iomem *rst = (void *)(CONFIG_SYS_FSL_RST_ADDR);
u32 cores, cpu_up_mask = 1;
int i, timeout = 10;
u64 *table = get_spin_tbl_addr();
cores = cpu_mask();
/* Clear spin table so that secondary processors
* observe the correct value after waking up from wfe.
*/
memset(table, 0, CONFIG_MAX_CPUS*SPIN_TABLE_ELEM_SIZE);
flush_dcache_range((unsigned long)table,
(unsigned long)table +
(CONFIG_MAX_CPUS*SPIN_TABLE_ELEM_SIZE));
printf("Waking secondary cores to start from %lx\n", gd->relocaddr);
out_le32(&gur->bootlocptrh, (u32)(gd->relocaddr >> 32));
out_le32(&gur->bootlocptrl, (u32)gd->relocaddr);
out_le32(&gur->scratchrw[6], 1);
asm volatile("dsb st" : : : "memory");
rst->brrl = cores;
asm volatile("dsb st" : : : "memory");
/* This is needed as a precautionary measure.
* If some code before this has accidentally released the secondary
* cores then the pre-bootloader code will trap them in a "wfe" unless
* the scratchrw[6] is set. In this case we need a sev here to get these
* cores moving again.
*/
asm volatile("sev");
while (timeout--) {
flush_dcache_range((unsigned long)table, (unsigned long)table +
CONFIG_MAX_CPUS * 64);
for (i = 1; i < CONFIG_MAX_CPUS; i++) {
if (table[i * WORDS_PER_SPIN_TABLE_ENTRY +
SPIN_TABLE_ELEM_STATUS_IDX])
cpu_up_mask |= 1 << i;
}
if (hweight32(cpu_up_mask) == hweight32(cores))
break;
udelay(10);
}
if (timeout <= 0) {
printf("Not all cores (0x%x) are up (0x%x)\n",
cores, cpu_up_mask);
return 1;
}
printf("All (%d) cores are up.\n", hweight32(cores));
return 0;
}
int is_core_valid(unsigned int core)
{
return !!((1 << core) & cpu_mask());
}
int cpu_reset(int nr)
{
puts("Feature is not implemented.\n");
return 0;
}
int cpu_disable(int nr)
{
puts("Feature is not implemented.\n");
return 0;
}
int core_to_pos(int nr)
{
u32 cores = cpu_mask();
int i, count = 0;
if (nr == 0) {
return 0;
} else if (nr >= hweight32(cores)) {
puts("Not a valid core number.\n");
return -1;
}
for (i = 1; i < 32; i++) {
if (is_core_valid(i)) {
count++;
if (count == nr)
break;
}
}
return count;
}
int cpu_status(int nr)
{
u64 *table;
int pos;
if (nr == 0) {
table = (u64 *)get_spin_tbl_addr();
printf("table base @ 0x%p\n", table);
} else {
pos = core_to_pos(nr);
if (pos < 0)
return -1;
table = (u64 *)get_spin_tbl_addr() + pos *
WORDS_PER_SPIN_TABLE_ENTRY;
printf("table @ 0x%p\n", table);
printf(" addr - 0x%016llx\n",
table[SPIN_TABLE_ELEM_ENTRY_ADDR_IDX]);
printf(" status - 0x%016llx\n",
table[SPIN_TABLE_ELEM_STATUS_IDX]);
printf(" lpid - 0x%016llx\n",
table[SPIN_TABLE_ELEM_LPID_IDX]);
}
return 0;
}
int cpu_release(int nr, int argc, char * const argv[])
{
u64 boot_addr;
u64 *table = (u64 *)get_spin_tbl_addr();
int pos;
pos = core_to_pos(nr);
if (pos <= 0)
return -1;
table += pos * WORDS_PER_SPIN_TABLE_ENTRY;
boot_addr = simple_strtoull(argv[0], NULL, 16);
table[SPIN_TABLE_ELEM_ENTRY_ADDR_IDX] = boot_addr;
flush_dcache_range((unsigned long)table,
(unsigned long)table + SPIN_TABLE_ELEM_SIZE);
asm volatile("dsb st");
smp_kick_all_cpus(); /* only those with entry addr set will run */
return 0;
}

36
arch/arm/cpu/armv8/fsl-lsch3/mp.h Normal file
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@ -0,0 +1,36 @@
/*
* Copyright 2014, Freescale Semiconductor
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _FSL_CH3_MP_H
#define _FSL_CH3_MP_H
/*
* Each spin table element is defined as
* struct {
* uint64_t entry_addr;
* uint64_t status;
* uint64_t lpid;
* };
* we pad this struct to 64 bytes so each entry is in its own cacheline
* the actual spin table is an array of these structures
*/
#define SPIN_TABLE_ELEM_ENTRY_ADDR_IDX 0
#define SPIN_TABLE_ELEM_STATUS_IDX 1
#define SPIN_TABLE_ELEM_LPID_IDX 2
#define WORDS_PER_SPIN_TABLE_ENTRY 8 /* pad to 64 bytes */
#define SPIN_TABLE_ELEM_SIZE 64
#define id_to_core(x) ((x & 3) | (x >> 6))
#ifndef __ASSEMBLY__
extern u64 __spin_table[];
extern u64 *secondary_boot_code;
extern size_t __secondary_boot_code_size;
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);
#endif
#endif /* _FSL_CH3_MP_H */

63
arch/arm/cpu/armv8/transition.S
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@ -14,70 +14,11 @@
ENTRY(armv8_switch_to_el2)
switch_el x0, 1f, 0f, 0f
0: ret
1:
mov x0, #0x5b1 /* Non-secure EL0/EL1 | HVC | 64bit EL2 */
msr scr_el3, x0
msr cptr_el3, xzr /* Disable coprocessor traps to EL3 */
mov x0, #0x33ff
msr cptr_el2, x0 /* Disable coprocessor traps to EL2 */
/* Initialize SCTLR_EL2 */
msr sctlr_el2, xzr
/* Return to the EL2_SP2 mode from EL3 */
mov x0, sp
msr sp_el2, x0 /* Migrate SP */
mrs x0, vbar_el3
msr vbar_el2, x0 /* Migrate VBAR */
mov x0, #0x3c9
msr spsr_el3, x0 /* EL2_SP2 | D | A | I | F */
msr elr_el3, lr
eret
1: armv8_switch_to_el2_m x0
ENDPROC(armv8_switch_to_el2)
ENTRY(armv8_switch_to_el1)
switch_el x0, 0f, 1f, 0f
0: ret
1:
/* Initialize Generic Timers */
mrs x0, cnthctl_el2
orr x0, x0, #0x3 /* Enable EL1 access to timers */
msr cnthctl_el2, x0
msr cntvoff_el2, xzr
mrs x0, cntkctl_el1
orr x0, x0, #0x3 /* Enable EL0 access to timers */
msr cntkctl_el1, x0
/* Initilize MPID/MPIDR registers */
mrs x0, midr_el1
mrs x1, mpidr_el1
msr vpidr_el2, x0
msr vmpidr_el2, x1
/* Disable coprocessor traps */
mov x0, #0x33ff
msr cptr_el2, x0 /* Disable coprocessor traps to EL2 */
msr hstr_el2, xzr /* Disable coprocessor traps to EL2 */
mov x0, #3 << 20
msr cpacr_el1, x0 /* Enable FP/SIMD at EL1 */
/* Initialize HCR_EL2 */
mov x0, #(1 << 31) /* 64bit EL1 */
orr x0, x0, #(1 << 29) /* Disable HVC */
msr hcr_el2, x0
/* SCTLR_EL1 initialization */
mov x0, #0x0800
movk x0, #0x30d0, lsl #16
msr sctlr_el1, x0
/* Return to the EL1_SP1 mode from EL2 */
mov x0, sp
msr sp_el1, x0 /* Migrate SP */
mrs x0, vbar_el2
msr vbar_el1, x0 /* Migrate VBAR */
mov x0, #0x3c5
msr spsr_el2, x0 /* EL1_SP1 | D | A | I | F */
msr elr_el2, lr
eret
1: armv8_switch_to_el1_m x0, x1
ENDPROC(armv8_switch_to_el1)

3
arch/arm/include/asm/arch-fsl-lsch3/config.h
View File

@ -8,7 +8,7 @@
#define _ASM_ARMV8_FSL_LSCH3_CONFIG_
#include <fsl_ddrc_version.h>
#define CONFIG_MP
#define CONFIG_SYS_FSL_OCRAM_BASE 0x18000000 /* initial RAM */
/* Link Definitions */
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_FSL_OCRAM_BASE + 0xfff0)
@ -19,6 +19,7 @@
#define CONFIG_SYS_FSL_DDR3_ADDR 0x08210000
#define CONFIG_SYS_FSL_GUTS_ADDR (CONFIG_SYS_IMMR + 0x00E00000)
#define CONFIG_SYS_FSL_PMU_ADDR (CONFIG_SYS_IMMR + 0x00E30000)
#define CONFIG_SYS_FSL_RST_ADDR (CONFIG_SYS_IMMR + 0x00E60000)
#define CONFIG_SYS_FSL_CH3_CLK_GRPA_ADDR (CONFIG_SYS_IMMR + 0x00300000)
#define CONFIG_SYS_FSL_CH3_CLK_GRPB_ADDR (CONFIG_SYS_IMMR + 0x00310000)
#define CONFIG_SYS_FSL_CH3_CLK_CTRL_ADDR (CONFIG_SYS_IMMR + 0x00370000)

35
arch/arm/include/asm/arch-fsl-lsch3/immap_lsch3.h
View File

@ -113,4 +113,39 @@ struct ccsr_clk_ctrl {
u8 res_04[0x20-0x04];
} clkcncsr[8];
};
struct ccsr_reset {
u32 rstcr; /* 0x000 */
u32 rstcrsp; /* 0x004 */
u8 res_008[0x10-0x08]; /* 0x008 */
u32 rstrqmr1; /* 0x010 */
u32 rstrqmr2; /* 0x014 */
u32 rstrqsr1; /* 0x018 */
u32 rstrqsr2; /* 0x01c */
u32 rstrqwdtmrl; /* 0x020 */
u32 rstrqwdtmru; /* 0x024 */
u8 res_028[0x30-0x28]; /* 0x028 */
u32 rstrqwdtsrl; /* 0x030 */
u32 rstrqwdtsru; /* 0x034 */
u8 res_038[0x60-0x38]; /* 0x038 */
u32 brrl; /* 0x060 */
u32 brru; /* 0x064 */
u8 res_068[0x80-0x68]; /* 0x068 */
u32 pirset; /* 0x080 */
u32 pirclr; /* 0x084 */
u8 res_088[0x90-0x88]; /* 0x088 */
u32 brcorenbr; /* 0x090 */
u8 res_094[0x100-0x94]; /* 0x094 */
u32 rcw_reqr; /* 0x100 */
u32 rcw_completion; /* 0x104 */
u8 res_108[0x110-0x108]; /* 0x108 */
u32 pbi_reqr; /* 0x110 */
u32 pbi_completion; /* 0x114 */
u8 res_118[0xa00-0x118]; /* 0x118 */
u32 qmbm_warmrst; /* 0xa00 */
u32 soc_warmrst; /* 0xa04 */
u8 res_a08[0xbf8-0xa08]; /* 0xa08 */
u32 ip_rev1; /* 0xbf8 */
u32 ip_rev2; /* 0xbfc */
};
#endif /* __ARCH_FSL_LSCH3_IMMAP_H */

93
arch/arm/include/asm/macro.h
View File

@ -105,6 +105,99 @@ lr .req x30
cbz \xreg1, \master_label
.endm
.macro armv8_switch_to_el2_m, xreg1
/* 64bit EL2 | HCE | SMD | RES1 (Bits[5:4]) | Non-secure EL0/EL1 */
mov \xreg1, #0x5b1
msr scr_el3, \xreg1
msr cptr_el3, xzr /* Disable coprocessor traps to EL3 */
mov \xreg1, #0x33ff
msr cptr_el2, \xreg1 /* Disable coprocessor traps to EL2 */
/* Initialize SCTLR_EL2
*
* setting RES1 bits (29,28,23,22,18,16,11,5,4) to 1
* and RES0 bits (31,30,27,26,24,21,20,17,15-13,10-6) +
* EE,WXN,I,SA,C,A,M to 0
*/
mov \xreg1, #0x0830
movk \xreg1, #0x30C5, lsl #16
msr sctlr_el2, \xreg1
/* Return to the EL2_SP2 mode from EL3 */
mov \xreg1, sp
msr sp_el2, \xreg1 /* Migrate SP */
mrs \xreg1, vbar_el3
msr vbar_el2, \xreg1 /* Migrate VBAR */
mov \xreg1, #0x3c9
msr spsr_el3, \xreg1 /* EL2_SP2 | D | A | I | F */
msr elr_el3, lr
eret
.endm
.macro armv8_switch_to_el1_m, xreg1, xreg2
/* Initialize Generic Timers */
mrs \xreg1, cnthctl_el2
orr \xreg1, \xreg1, #0x3 /* Enable EL1 access to timers */
msr cnthctl_el2, \xreg1
msr cntvoff_el2, xzr
/* Initilize MPID/MPIDR registers */
mrs \xreg1, midr_el1
mrs \xreg2, mpidr_el1
msr vpidr_el2, \xreg1
msr vmpidr_el2, \xreg2
/* Disable coprocessor traps */
mov \xreg1, #0x33ff
msr cptr_el2, \xreg1 /* Disable coprocessor traps to EL2 */
msr hstr_el2, xzr /* Disable coprocessor traps to EL2 */
mov \xreg1, #3 << 20
msr cpacr_el1, \xreg1 /* Enable FP/SIMD at EL1 */
/* Initialize HCR_EL2 */
mov \xreg1, #(1 << 31) /* 64bit EL1 */
orr \xreg1, \xreg1, #(1 << 29) /* Disable HVC */
msr hcr_el2, \xreg1
/* SCTLR_EL1 initialization
*
* setting RES1 bits (29,28,23,22,20,11) to 1
* and RES0 bits (31,30,27,21,17,13,10,6) +
* UCI,EE,EOE,WXN,nTWE,nTWI,UCT,DZE,I,UMA,SED,ITD,
* CP15BEN,SA0,SA,C,A,M to 0
*/
mov \xreg1, #0x0800
movk \xreg1, #0x30d0, lsl #16
msr sctlr_el1, \xreg1
/* Return to the EL1_SP1 mode from EL2 */
mov \xreg1, sp
msr sp_el1, \xreg1 /* Migrate SP */
mrs \xreg1, vbar_el2
msr vbar_el1, \xreg1 /* Migrate VBAR */
mov \xreg1, #0x3c5
msr spsr_el2, \xreg1 /* EL1_SP1 | D | A | I | F */
msr elr_el2, lr
eret
.endm
#if defined(CONFIG_GICV3)
.macro gic_wait_for_interrupt_m xreg1
0 : wfi
mrs \xreg1, ICC_IAR1_EL1
msr ICC_EOIR1_EL1, \xreg1
cbnz \xreg1, 0b
.endm
#elif defined(CONFIG_GICV2)
.macro gic_wait_for_interrupt_m xreg1, wreg2
0 : wfi
ldr \wreg2, [\xreg1, GICC_AIAR]
str \wreg2, [\xreg1, GICC_AEOIR]
and \wreg2, \wreg2, #3ff
cbnz \wreg2, 0b
.endm
#endif
#endif /* CONFIG_ARM64 */
#endif /* __ASSEMBLY__ */

10
arch/arm/lib/gic_64.S
View File

@ -10,8 +10,8 @@
#include <asm-offsets.h>
#include <config.h>
#include <linux/linkage.h>
#include <asm/macro.h>
#include <asm/gic.h>
#include <asm/macro.h>
/*************************************************************************
@ -181,14 +181,10 @@ ENDPROC(gic_kick_secondary_cpus)
*
*************************************************************************/
ENTRY(gic_wait_for_interrupt)
0: wfi
#if defined(CONFIG_GICV3)
mrs x9, ICC_IAR1_EL1
msr ICC_EOIR1_EL1, x9
gic_wait_for_interrupt_m x9
#elif defined(CONFIG_GICV2)
ldr w9, [x0, GICC_AIAR]
str w9, [x0, GICC_AEOIR]
gic_wait_for_interrupt_m x0, w9
#endif
cbnz w9, 0b
ret
ENDPROC(gic_wait_for_interrupt)