| /* |
| * Copyright (c) 2021, Arm Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <common/bl_common.h> |
| #include <cortex_x2.h> |
| #include <cpu_macros.S> |
| #include <plat_macros.S> |
| |
| /* Hardware handled coherency */ |
| #if HW_ASSISTED_COHERENCY == 0 |
| #error "Cortex X2 must be compiled with HW_ASSISTED_COHERENCY enabled" |
| #endif |
| |
| /* 64-bit only core */ |
| #if CTX_INCLUDE_AARCH32_REGS == 1 |
| #error "Cortex X2 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" |
| #endif |
| |
| /* -------------------------------------------------- |
| * Errata Workaround for Cortex X2 Errata #2002765. |
| * This applies to revisions r0p0, r1p0, and r2p0 and |
| * is open. |
| * x0: variant[4:7] and revision[0:3] of current cpu. |
| * Shall clobber: x0, x1, x17 |
| * -------------------------------------------------- |
| */ |
| func errata_cortex_x2_2002765_wa |
| /* Check workaround compatibility. */ |
| mov x17, x30 |
| bl check_errata_2002765 |
| cbz x0, 1f |
| |
| ldr x0, =0x6 |
| msr S3_6_C15_C8_0, x0 /* CPUPSELR_EL3 */ |
| ldr x0, =0xF3A08002 |
| msr S3_6_C15_C8_2, x0 /* CPUPOR_EL3 */ |
| ldr x0, =0xFFF0F7FE |
| msr S3_6_C15_C8_3, x0 /* CPUPMR_EL3 */ |
| ldr x0, =0x40000001003ff |
| msr S3_6_C15_C8_1, x0 /* CPUPCR_EL3 */ |
| isb |
| |
| 1: |
| ret x17 |
| endfunc errata_cortex_x2_2002765_wa |
| |
| func check_errata_2002765 |
| /* Applies to r0p0 - r2p0 */ |
| mov x1, #0x20 |
| b cpu_rev_var_ls |
| endfunc check_errata_2002765 |
| |
| /* -------------------------------------------------- |
| * Errata Workaround for Cortex X2 Errata #2058056. |
| * This applies to revisions r0p0, r1p0, and r2p0 and |
| * is open. |
| * x0: variant[4:7] and revision[0:3] of current cpu. |
| * Shall clobber: x0, x1, x17 |
| * -------------------------------------------------- |
| */ |
| func errata_cortex_x2_2058056_wa |
| /* Check workaround compatibility. */ |
| mov x17, x30 |
| bl check_errata_2058056 |
| cbz x0, 1f |
| |
| mrs x1, CORTEX_X2_CPUECTLR2_EL1 |
| mov x0, #CORTEX_X2_CPUECTLR2_EL1_PF_MODE_CNSRV |
| bfi x1, x0, #CORTEX_X2_CPUECTLR2_EL1_PF_MODE_SHIFT, #CORTEX_X2_CPUECTLR2_EL1_PF_MODE_WIDTH |
| msr CORTEX_X2_CPUECTLR2_EL1, x1 |
| |
| 1: |
| ret x17 |
| endfunc errata_cortex_x2_2058056_wa |
| |
| func check_errata_2058056 |
| /* Applies to r0p0 - r2p0 */ |
| mov x1, #0x20 |
| b cpu_rev_var_ls |
| endfunc check_errata_2058056 |
| |
| /* -------------------------------------------------- |
| * Errata Workaround for Cortex X2 Errata #2083908. |
| * This applies to revision r2p0 and is open. |
| * x0: variant[4:7] and revision[0:3] of current cpu. |
| * Shall clobber: x0-x2, x17 |
| * -------------------------------------------------- |
| */ |
| func errata_cortex_x2_2083908_wa |
| /* Check workaround compatibility. */ |
| mov x17, x30 |
| bl check_errata_2083908 |
| cbz x0, 1f |
| |
| /* Apply the workaround by setting bit 13 in CPUACTLR5_EL1. */ |
| mrs x1, CORTEX_X2_CPUACTLR5_EL1 |
| orr x1, x1, #BIT(13) |
| msr CORTEX_X2_CPUACTLR5_EL1, x1 |
| |
| 1: |
| ret x17 |
| endfunc errata_cortex_x2_2083908_wa |
| |
| func check_errata_2083908 |
| /* Applies to r2p0 */ |
| mov x1, #0x20 |
| mov x2, #0x20 |
| b cpu_rev_var_range |
| endfunc check_errata_2083908 |
| |
| /* ---------------------------------------------------- |
| * HW will do the cache maintenance while powering down |
| * ---------------------------------------------------- |
| */ |
| func cortex_x2_core_pwr_dwn |
| /* --------------------------------------------------- |
| * Enable CPU power down bit in power control register |
| * --------------------------------------------------- |
| */ |
| mrs x0, CORTEX_X2_CPUPWRCTLR_EL1 |
| orr x0, x0, #CORTEX_X2_CPUPWRCTLR_EL1_CORE_PWRDN_BIT |
| msr CORTEX_X2_CPUPWRCTLR_EL1, x0 |
| isb |
| ret |
| endfunc cortex_x2_core_pwr_dwn |
| |
| /* |
| * Errata printing function for Cortex X2. Must follow AAPCS. |
| */ |
| #if REPORT_ERRATA |
| func cortex_x2_errata_report |
| stp x8, x30, [sp, #-16]! |
| |
| bl cpu_get_rev_var |
| mov x8, x0 |
| |
| /* |
| * Report all errata. The revision-variant information is passed to |
| * checking functions of each errata. |
| */ |
| report_errata ERRATA_X2_2002765, cortex_x2, 2002765 |
| report_errata ERRATA_X2_2058056, cortex_x2, 2058056 |
| report_errata ERRATA_X2_2083908, cortex_x2, 2083908 |
| |
| ldp x8, x30, [sp], #16 |
| ret |
| endfunc cortex_x2_errata_report |
| #endif |
| |
| func cortex_x2_reset_func |
| mov x19, x30 |
| |
| /* Disable speculative loads */ |
| msr SSBS, xzr |
| isb |
| |
| /* Get the CPU revision and stash it in x18. */ |
| bl cpu_get_rev_var |
| mov x18, x0 |
| |
| #if ERRATA_X2_2002765 |
| mov x0, x18 |
| bl errata_cortex_x2_2002765_wa |
| #endif |
| |
| #if ERRATA_X2_2058056 |
| mov x0, x18 |
| bl errata_cortex_x2_2058056_wa |
| #endif |
| |
| #if ERRATA_X2_2083908 |
| mov x0, x18 |
| bl errata_cortex_x2_2083908_wa |
| #endif |
| |
| ret x19 |
| endfunc cortex_x2_reset_func |
| |
| /* --------------------------------------------- |
| * This function provides Cortex X2 specific |
| * register information for crash reporting. |
| * It needs to return with x6 pointing to |
| * a list of register names in ascii and |
| * x8 - x15 having values of registers to be |
| * reported. |
| * --------------------------------------------- |
| */ |
| .section .rodata.cortex_x2_regs, "aS" |
| cortex_x2_regs: /* The ascii list of register names to be reported */ |
| .asciz "cpuectlr_el1", "" |
| |
| func cortex_x2_cpu_reg_dump |
| adr x6, cortex_x2_regs |
| mrs x8, CORTEX_X2_CPUECTLR_EL1 |
| ret |
| endfunc cortex_x2_cpu_reg_dump |
| |
| declare_cpu_ops cortex_x2, CORTEX_X2_MIDR, \ |
| cortex_x2_reset_func, \ |
| cortex_x2_core_pwr_dwn |