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/*
* (C) Copyright 2014 Freescale Semiconductor
*
* SPDX-License-Identifier: GPL-2.0+
*
* Extracted from armv8/start.S
*/
#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 */
/* Set the SMMU page size in the sACR register */
ldr x1, =SMMU_BASE
ldr w0, [x1, #0x10]
orr w0, w0, #1 << 16 /* set sACR.pagesize to indicate 64K page */
str w0, [x1, #0x10]
/* Initialize GIC Secure Bank Status */
#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
branch_if_slave x0, 1f
ldr x0, =GICD_BASE
bl gic_init_secure
1:
#ifdef CONFIG_GICV3
ldr x0, =GICR_BASE
bl gic_init_secure_percpu
#elif defined(CONFIG_GICV2)
ldr x0, =GICD_BASE
ldr x1, =GICC_BASE
bl gic_init_secure_percpu
#endif
#endif
branch_if_master x0, x1, 2f
ldr x0, =secondary_boot_func
blr x0
2:
#ifdef CONFIG_FSL_TZPC_BP147
/* Set Non Secure access for all devices protected via TZPC */
ldr x1, =TZPCDECPROT_0_SET_BASE /* Decode Protection-0 Set Reg */
orr w0, w0, #1 << 3 /* DCFG_RESET is accessible from NS world */
str w0, [x1]
isb
dsb sy
#endif
#ifdef CONFIG_FSL_TZASC_400
/* Set TZASC so that:
* a. We use only Region0 whose global secure write/read is EN
* b. We use only Region0 whose NSAID write/read is EN
*
* NOTE: As per the CCSR map doc, TZASC 3 and TZASC 4 are just
* placeholders.
*/
ldr x1, =TZASC_GATE_KEEPER(0)
ldr x0, [x1] /* Filter 0 Gate Keeper Register */
orr x0, x0, #1 << 0 /* Set open_request for Filter 0 */
str x0, [x1]
ldr x1, =TZASC_GATE_KEEPER(1)
ldr x0, [x1] /* Filter 0 Gate Keeper Register */
orr x0, x0, #1 << 0 /* Set open_request for Filter 0 */
str x0, [x1]
ldr x1, =TZASC_REGION_ATTRIBUTES_0(0)
ldr x0, [x1] /* Region-0 Attributes Register */
orr x0, x0, #1 << 31 /* Set Sec global write en, Bit[31] */
orr x0, x0, #1 << 30 /* Set Sec global read en, Bit[30] */
str x0, [x1]
ldr x1, =TZASC_REGION_ATTRIBUTES_0(1)
ldr x0, [x1] /* Region-1 Attributes Register */
orr x0, x0, #1 << 31 /* Set Sec global write en, Bit[31] */
orr x0, x0, #1 << 30 /* Set Sec global read en, Bit[30] */
str x0, [x1]
ldr x1, =TZASC_REGION_ID_ACCESS_0(0)
ldr w0, [x1] /* Region-0 Access Register */
mov w0, #0xFFFFFFFF /* Set nsaid_wr_en and nsaid_rd_en */
str w0, [x1]
ldr x1, =TZASC_REGION_ID_ACCESS_0(1)
ldr w0, [x1] /* Region-1 Attributes Register */
mov w0, #0xFFFFFFFF /* Set nsaid_wr_en and nsaid_rd_en */
str w0, [x1]
isb
dsb sy
#endif
mov lr, x29 /* Restore LR */
ret
ENDPROC(lowlevel_init)
hnf_pstate_poll:
/* x0 has the desired status, return 0 for success, 1 for timeout
* clobber x1, x2, x3, x4, x6, x7
*/
mov x1, x0
mov x7, #0 /* flag for timeout */
mrs x3, cntpct_el0 /* read timer */
add x3, x3, #1200 /* timeout after 100 microseconds */
mov x0, #0x18
movk x0, #0x420, lsl #16 /* HNF0_PSTATE_STATUS */
mov w6, #8 /* HN-F node count */
1:
ldr x2, [x0]
cmp x2, x1 /* check status */
b.eq 2f
mrs x4, cntpct_el0
cmp x4, x3
b.ls 1b
mov x7, #1 /* timeout */
b 3f
2:
add x0, x0, #0x10000 /* move to next node */
subs w6, w6, #1
cbnz w6, 1b
3:
mov x0, x7
ret
hnf_set_pstate:
/* x0 has the desired state, clobber x1, x2, x6 */
mov x1, x0
/* power state to SFONLY */
mov w6, #8 /* HN-F node count */
mov x0, #0x10
movk x0, #0x420, lsl #16 /* HNF0_PSTATE_REQ */
1: /* set pstate to sfonly */
ldr x2, [x0]
and x2, x2, #0xfffffffffffffffc /* & HNFPSTAT_MASK */
orr x2, x2, x1
str x2, [x0]
add x0, x0, #0x10000 /* move to next node */
subs w6, w6, #1
cbnz w6, 1b
ret
ENTRY(__asm_flush_l3_cache)
/*
* Return status in x0
* success 0
* tmeout 1 for setting SFONLY, 2 for FAM, 3 for both
*/
mov x29, lr
mov x8, #0
dsb sy
mov x0, #0x1 /* HNFPSTAT_SFONLY */
bl hnf_set_pstate
mov x0, #0x4 /* SFONLY status */
bl hnf_pstate_poll
cbz x0, 1f
mov x8, #1 /* timeout */
1:
dsb sy
mov x0, #0x3 /* HNFPSTAT_FAM */
bl hnf_set_pstate
mov x0, #0xc /* FAM status */
bl hnf_pstate_poll
cbz x0, 1f
add x8, x8, #0x2
1:
mov x0, x8
mov lr, x29
ret
ENDPROC(__asm_flush_l3_cache)
/* 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
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