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-rw-r--r--lib/cpus/aarch64/neoverse_v1.S628
1 files changed, 628 insertions, 0 deletions
diff --git a/lib/cpus/aarch64/neoverse_v1.S b/lib/cpus/aarch64/neoverse_v1.S
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+/*
+ * Copyright (c) 2019-2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <common/bl_common.h>
+#include <neoverse_v1.h>
+#include <cpu_macros.S>
+#include <plat_macros.S>
+#include "wa_cve_2022_23960_bhb_vector.S"
+
+/* Hardware handled coherency */
+#if HW_ASSISTED_COHERENCY == 0
+#error "Neoverse V1 must be compiled with HW_ASSISTED_COHERENCY enabled"
+#endif
+
+/* 64-bit only core */
+#if CTX_INCLUDE_AARCH32_REGS == 1
+#error "Neoverse-V1 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
+#endif
+
+#if WORKAROUND_CVE_2022_23960
+ wa_cve_2022_23960_bhb_vector_table NEOVERSE_V1_BHB_LOOP_COUNT, neoverse_v1
+#endif /* WORKAROUND_CVE_2022_23960 */
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #1618635.
+ * This applies to revision r0p0 and is fixed in
+ * r1p0.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0, x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_1618635_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_1618635
+ cbz x0, 1f
+
+ /* Inserts a DMB SY before and after MRS PAR_EL1 */
+ ldr x0, =0x0
+ msr NEOVERSE_V1_CPUPSELR_EL3, x0
+ ldr x0, = 0xEE070F14
+ msr NEOVERSE_V1_CPUPOR_EL3, x0
+ ldr x0, = 0xFFFF0FFF
+ msr NEOVERSE_V1_CPUPMR_EL3, x0
+ ldr x0, =0x4005027FF
+ msr NEOVERSE_V1_CPUPCR_EL3, x0
+
+ /* Inserts a DMB SY before STREX imm offset */
+ ldr x0, =0x1
+ msr NEOVERSE_V1_CPUPSELR_EL3, x0
+ ldr x0, =0x00e8400000
+ msr NEOVERSE_V1_CPUPOR_EL3, x0
+ ldr x0, =0x00fff00000
+ msr NEOVERSE_V1_CPUPMR_EL3, x0
+ ldr x0, = 0x4001027FF
+ msr NEOVERSE_V1_CPUPCR_EL3, x0
+
+ /* Inserts a DMB SY before STREX[BHD}/STLEX* */
+ ldr x0, =0x2
+ msr NEOVERSE_V1_CPUPSELR_EL3, x0
+ ldr x0, =0x00e8c00040
+ msr NEOVERSE_V1_CPUPOR_EL3, x0
+ ldr x0, =0x00fff00040
+ msr NEOVERSE_V1_CPUPMR_EL3, x0
+ ldr x0, = 0x4001027FF
+ msr NEOVERSE_V1_CPUPCR_EL3, x0
+
+ /* Inserts a DMB SY after STREX imm offset */
+ ldr x0, =0x3
+ msr NEOVERSE_V1_CPUPSELR_EL3, x0
+ ldr x0, =0x00e8400000
+ msr NEOVERSE_V1_CPUPOR_EL3, x0
+ ldr x0, =0x00fff00000
+ msr NEOVERSE_V1_CPUPMR_EL3, x0
+ ldr x0, = 0x4004027FF
+ msr NEOVERSE_V1_CPUPCR_EL3, x0
+
+ /* Inserts a DMB SY after STREX[BHD}/STLEX* */
+ ldr x0, =0x4
+ msr NEOVERSE_V1_CPUPSELR_EL3, x0
+ ldr x0, =0x00e8c00040
+ msr NEOVERSE_V1_CPUPOR_EL3, x0
+ ldr x0, =0x00fff00040
+ msr NEOVERSE_V1_CPUPMR_EL3, x0
+ ldr x0, = 0x4004027FF
+ msr NEOVERSE_V1_CPUPCR_EL3, x0
+
+ /* Synchronize to enable patches */
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_1618635_wa
+
+func check_errata_1618635
+ /* Applies to revision r0p0. */
+ mov x1, #0x00
+ b cpu_rev_var_ls
+endfunc check_errata_1618635
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #1774420.
+ * This applies to revisions r0p0 and r1p0, fixed in r1p1.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_1774420_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_1774420
+ cbz x0, 1f
+
+ /* Set bit 53 in CPUECTLR_EL1 */
+ mrs x1, NEOVERSE_V1_CPUECTLR_EL1
+ orr x1, x1, #NEOVERSE_V1_CPUECTLR_EL1_BIT_53
+ msr NEOVERSE_V1_CPUECTLR_EL1, x1
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_1774420_wa
+
+func check_errata_1774420
+ /* Applies to r0p0 and r1p0. */
+ mov x1, #0x10
+ b cpu_rev_var_ls
+endfunc check_errata_1774420
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #1791573.
+ * This applies to revisions r0p0 and r1p0, fixed in r1p1.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_1791573_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_1791573
+ cbz x0, 1f
+
+ /* Set bit 2 in ACTLR2_EL1 */
+ mrs x1, NEOVERSE_V1_ACTLR2_EL1
+ orr x1, x1, #NEOVERSE_V1_ACTLR2_EL1_BIT_2
+ msr NEOVERSE_V1_ACTLR2_EL1, x1
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_1791573_wa
+
+func check_errata_1791573
+ /* Applies to r0p0 and r1p0. */
+ mov x1, #0x10
+ b cpu_rev_var_ls
+endfunc check_errata_1791573
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #1852267.
+ * This applies to revisions r0p0 and r1p0, fixed in r1p1.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_1852267_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_1852267
+ cbz x0, 1f
+
+ /* Set bit 28 in ACTLR2_EL1 */
+ mrs x1, NEOVERSE_V1_ACTLR2_EL1
+ orr x1, x1, #NEOVERSE_V1_ACTLR2_EL1_BIT_28
+ msr NEOVERSE_V1_ACTLR2_EL1, x1
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_1852267_wa
+
+func check_errata_1852267
+ /* Applies to r0p0 and r1p0. */
+ mov x1, #0x10
+ b cpu_rev_var_ls
+endfunc check_errata_1852267
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #1925756.
+ * This applies to revisions <= r1p1.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_1925756_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_1925756
+ cbz x0, 1f
+
+ /* Set bit 8 in CPUECTLR_EL1 */
+ mrs x1, NEOVERSE_V1_CPUECTLR_EL1
+ orr x1, x1, #NEOVERSE_V1_CPUECTLR_EL1_BIT_8
+ msr NEOVERSE_V1_CPUECTLR_EL1, x1
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_1925756_wa
+
+func check_errata_1925756
+ /* Applies to <= r1p1. */
+ mov x1, #0x11
+ b cpu_rev_var_ls
+endfunc check_errata_1925756
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Erratum #1940577
+ * This applies to revisions r1p0 - r1p1 and is open.
+ * It also exists in r0p0 but there is no fix in that
+ * revision.
+ * Inputs:
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_1940577_wa
+ /* Compare x0 against revisions r1p0 - r1p1 */
+ mov x17, x30
+ bl check_errata_1940577
+ cbz x0, 1f
+
+ mov x0, #0
+ msr S3_6_C15_C8_0, x0
+ ldr x0, =0x10E3900002
+ msr S3_6_C15_C8_2, x0
+ ldr x0, =0x10FFF00083
+ msr S3_6_C15_C8_3, x0
+ ldr x0, =0x2001003FF
+ msr S3_6_C15_C8_1, x0
+
+ mov x0, #1
+ msr S3_6_C15_C8_0, x0
+ ldr x0, =0x10E3800082
+ msr S3_6_C15_C8_2, x0
+ ldr x0, =0x10FFF00083
+ msr S3_6_C15_C8_3, x0
+ ldr x0, =0x2001003FF
+ msr S3_6_C15_C8_1, x0
+
+ mov x0, #2
+ msr S3_6_C15_C8_0, x0
+ ldr x0, =0x10E3800200
+ msr S3_6_C15_C8_2, x0
+ ldr x0, =0x10FFF003E0
+ msr S3_6_C15_C8_3, x0
+ ldr x0, =0x2001003FF
+ msr S3_6_C15_C8_1, x0
+
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_1940577_wa
+
+func check_errata_1940577
+ /* Applies to revisions r1p0 - r1p1. */
+ mov x1, #0x10
+ mov x2, #0x11
+ b cpu_rev_var_range
+endfunc check_errata_1940577
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #1966096
+ * This applies to revisions r1p0 - r1p1 and is open.
+ * It also exists in r0p0 but there is no workaround
+ * for that revision.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_1966096_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_1966096
+ cbz x0, 1f
+
+ /* Apply the workaround. */
+ mov x0, #0x3
+ msr S3_6_C15_C8_0, x0
+ ldr x0, =0xEE010F12
+ msr S3_6_C15_C8_2, x0
+ ldr x0, =0xFFFF0FFF
+ msr S3_6_C15_C8_3, x0
+ ldr x0, =0x80000000003FF
+ msr S3_6_C15_C8_1, x0
+ isb
+
+1:
+ ret x17
+endfunc errata_neoverse_v1_1966096_wa
+
+func check_errata_1966096
+ mov x1, #0x10
+ mov x2, #0x11
+ b cpu_rev_var_range
+endfunc check_errata_1966096
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #2139242.
+ * This applies to revisions r0p0, r1p0, and r1p1, it
+ * is still open.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_2139242_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_2139242
+ cbz x0, 1f
+
+ /* Apply the workaround. */
+ mov x0, #0x3
+ msr S3_6_C15_C8_0, x0
+ ldr x0, =0xEE720F14
+ msr S3_6_C15_C8_2, x0
+ ldr x0, =0xFFFF0FDF
+ msr S3_6_C15_C8_3, x0
+ ldr x0, =0x40000005003FF
+ msr S3_6_C15_C8_1, x0
+ isb
+
+1:
+ ret x17
+endfunc errata_neoverse_v1_2139242_wa
+
+func check_errata_2139242
+ /* Applies to r0p0, r1p0, r1p1 */
+ mov x1, #0x11
+ b cpu_rev_var_ls
+endfunc check_errata_2139242
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #2108267.
+ * This applies to revisions r0p0, r1p0, and r1p1, it
+ * is still open.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x1, x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_2108267_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_2108267
+ cbz x0, 1f
+
+ /* Apply the workaround. */
+ mrs x1, NEOVERSE_V1_CPUECTLR_EL1
+ mov x0, #NEOVERSE_V1_CPUECTLR_EL1_PF_MODE_CNSRV
+ bfi x1, x0, #CPUECTLR_EL1_PF_MODE_LSB, #CPUECTLR_EL1_PF_MODE_WIDTH
+ msr NEOVERSE_V1_CPUECTLR_EL1, x1
+1:
+ ret x17
+endfunc errata_neoverse_v1_2108267_wa
+
+func check_errata_2108267
+ /* Applies to r0p0, r1p0, r1p1 */
+ mov x1, #0x11
+ b cpu_rev_var_ls
+endfunc check_errata_2108267
+
+ /* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #2216392.
+ * This applies to revisions r1p0 and r1p1 and is
+ * still open.
+ * This issue is also present in r0p0 but there is no
+ * workaround in that revision.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_2216392_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_2216392
+ cbz x0, 1f
+
+ ldr x0, =0x5
+ msr S3_6_c15_c8_0, x0 /* CPUPSELR_EL3 */
+ ldr x0, =0x10F600E000
+ msr S3_6_c15_c8_2, x0 /* CPUPOR_EL3 */
+ ldr x0, =0x10FF80E000
+ msr S3_6_c15_c8_3, x0 /* CPUPMR_EL3 */
+ ldr x0, =0x80000000003FF
+ msr S3_6_c15_c8_1, x0 /* CPUPCR_EL3 */
+
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_2216392_wa
+
+func check_errata_2216392
+ /* Applies to revisions r1p0 and r1p1. */
+ mov x1, #CPU_REV(1, 0)
+ mov x2, #CPU_REV(1, 1)
+ b cpu_rev_var_range
+endfunc check_errata_2216392
+
+ /* -----------------------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #2294912.
+ * This applies to revisions r0p0, r1p0, and r1p1 and is still open.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * -----------------------------------------------------------------
+ */
+func errata_neoverse_v1_2294912_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_2294912
+ cbz x0, 1f
+
+ /* Set bit 0 in ACTLR2_EL1 */
+ mrs x1, NEOVERSE_V1_ACTLR2_EL1
+ orr x1, x1, #NEOVERSE_V1_ACTLR2_EL1_BIT_0
+ msr NEOVERSE_V1_ACTLR2_EL1, x1
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_2294912_wa
+
+func check_errata_2294912
+ /* Applies to r0p0, r1p0, and r1p1 right now */
+ mov x1, #0x11
+ b cpu_rev_var_ls
+endfunc check_errata_2294912
+
+ /* ---------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #2372203.
+ * This applies to revisions <= r1p1 and is still open.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * ----------------------------------------------------
+ */
+func errata_neoverse_v1_2372203_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_2372203
+ cbz x0, 1f
+
+ /* Set bit 40 in ACTLR2_EL1 */
+ mrs x1, NEOVERSE_V1_ACTLR2_EL1
+ orr x1, x1, #NEOVERSE_V1_ACTLR2_EL1_BIT_40
+ msr NEOVERSE_V1_ACTLR2_EL1, x1
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_2372203_wa
+
+func check_errata_2372203
+ /* Applies to <= r1p1. */
+ mov x1, #0x11
+ b cpu_rev_var_ls
+endfunc check_errata_2372203
+
+func check_errata_cve_2022_23960
+#if WORKAROUND_CVE_2022_23960
+ mov x0, #ERRATA_APPLIES
+#else
+ mov x0, #ERRATA_MISSING
+#endif
+ ret
+endfunc check_errata_cve_2022_23960
+
+ /* ---------------------------------------------
+ * HW will do the cache maintenance while powering down
+ * ---------------------------------------------
+ */
+func neoverse_v1_core_pwr_dwn
+ /* ---------------------------------------------
+ * Enable CPU power down bit in power control register
+ * ---------------------------------------------
+ */
+ mrs x0, NEOVERSE_V1_CPUPWRCTLR_EL1
+ orr x0, x0, #NEOVERSE_V1_CPUPWRCTLR_EL1_CORE_PWRDN_BIT
+ msr NEOVERSE_V1_CPUPWRCTLR_EL1, x0
+ isb
+ ret
+endfunc neoverse_v1_core_pwr_dwn
+
+ /*
+ * Errata printing function for Neoverse V1. Must follow AAPCS.
+ */
+#if REPORT_ERRATA
+func neoverse_v1_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_V1_1618635, neoverse_v1, 1618635
+ report_errata ERRATA_V1_1774420, neoverse_v1, 1774420
+ report_errata ERRATA_V1_1791573, neoverse_v1, 1791573
+ report_errata ERRATA_V1_1852267, neoverse_v1, 1852267
+ report_errata ERRATA_V1_1925756, neoverse_v1, 1925756
+ report_errata ERRATA_V1_1940577, neoverse_v1, 1940577
+ report_errata ERRATA_V1_1966096, neoverse_v1, 1966096
+ report_errata ERRATA_V1_2108267, neoverse_v1, 2108267
+ report_errata ERRATA_V1_2139242, neoverse_v1, 2139242
+ report_errata ERRATA_V1_2216392, neoverse_v1, 2216392
+ report_errata ERRATA_V1_2294912, neoverse_v1, 2294912
+ report_errata ERRATA_V1_2372203, neoverse_v1, 2372203
+ report_errata WORKAROUND_CVE_2022_23960, neoverse_v1, cve_2022_23960
+
+ ldp x8, x30, [sp], #16
+ ret
+endfunc neoverse_v1_errata_report
+#endif
+
+func neoverse_v1_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_V1_1618635
+ mov x0, x18
+ bl errata_neoverse_v1_1618635_wa
+#endif
+
+#if ERRATA_V1_1774420
+ mov x0, x18
+ bl errata_neoverse_v1_1774420_wa
+#endif
+
+#if ERRATA_V1_1791573
+ mov x0, x18
+ bl errata_neoverse_v1_1791573_wa
+#endif
+
+#if ERRATA_V1_1852267
+ mov x0, x18
+ bl errata_neoverse_v1_1852267_wa
+#endif
+
+#if ERRATA_V1_1925756
+ mov x0, x18
+ bl errata_neoverse_v1_1925756_wa
+#endif
+
+#if ERRATA_V1_1940577
+ mov x0, x18
+ bl errata_neoverse_v1_1940577_wa
+#endif
+
+#if ERRATA_V1_1966096
+ mov x0, x18
+ bl errata_neoverse_v1_1966096_wa
+#endif
+
+#if ERRATA_V1_2139242
+ mov x0, x18
+ bl errata_neoverse_v1_2139242_wa
+#endif
+
+#if ERRATA_V1_2108267
+ mov x0, x18
+ bl errata_neoverse_v1_2108267_wa
+#endif
+
+#if ERRATA_V1_2216392
+ mov x0, x18
+ bl errata_neoverse_v1_2216392_wa
+#endif
+
+#if ERRATA_V1_2294912
+ mov x0, x18
+ bl errata_neoverse_v1_2294912_wa
+#endif
+
+#if ERRATA_V1_2372203
+ mov x0, x18
+ bl errata_neoverse_v1_2372203_wa
+#endif
+
+#if IMAGE_BL31 && WORKAROUND_CVE_2022_23960
+ /*
+ * The Neoverse-V1 generic vectors are overridden to apply errata
+ * mitigation on exception entry from lower ELs.
+ */
+ adr x0, wa_cve_vbar_neoverse_v1
+ msr vbar_el3, x0
+#endif /* IMAGE_BL31 && WORKAROUND_CVE_2022_23960 */
+
+ isb
+ ret x19
+endfunc neoverse_v1_reset_func
+
+ /* ---------------------------------------------
+ * This function provides Neoverse-V1 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.neoverse_v1_regs, "aS"
+neoverse_v1_regs: /* The ascii list of register names to be reported */
+ .asciz "cpuectlr_el1", ""
+
+func neoverse_v1_cpu_reg_dump
+ adr x6, neoverse_v1_regs
+ mrs x8, NEOVERSE_V1_CPUECTLR_EL1
+ ret
+endfunc neoverse_v1_cpu_reg_dump
+
+declare_cpu_ops neoverse_v1, NEOVERSE_V1_MIDR, \
+ neoverse_v1_reset_func, \
+ neoverse_v1_core_pwr_dwn