/* * (C) Copyright 2014 Freescale Semiconductor * * SPDX-License-Identifier: GPL-2.0+ * * Extracted from armv8/start.S */ #include #include #include #include #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