refactor(cpus): convert Rainier to use errata framework
This involves replacing:
* the reset_func with the standard cpu_reset_func_{start,end} to apply
errata automatically
* the <cpu>_errata_report with the errata_report_shim to report errata
automatically
as well as specifically related to single errata for this CPU:
* the prologue with the workaround_<type>_start to do the checks and
framework registration automatically
* the epilogue with the workaround_<type>_end
* the checker function with the check_erratum_<type> to make it more
descriptive
Change-Id: I31cacbbdd4caa12b32e2c65ec456b0ab6b1a9101
Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
diff --git a/lib/cpus/aarch64/rainier.S b/lib/cpus/aarch64/rainier.S
index 3b7b8b2..c770f54 100644
--- a/lib/cpus/aarch64/rainier.S
+++ b/lib/cpus/aarch64/rainier.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2020-2022, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2023, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -41,78 +41,30 @@
ret
endfunc rainier_disable_speculative_loads
- /* --------------------------------------------------
- * Errata Workaround for Neoverse N1 Errata #1868343.
- * This applies to revision <= r4p0 of Neoverse N1.
- * This workaround is the same as the workaround for
- * errata 1262606 and 1275112 but applies to a wider
- * revision range.
- * Rainier R0P0 is based on Neoverse N1 R4P0 so the
- * workaround checks for r0p0 version of Rainier CPU.
- * Inputs:
- * x0: variant[4:7] and revision[0:3] of current cpu.
- * Shall clobber: x0, x1 & x17
- * --------------------------------------------------
- */
-func errata_n1_1868343_wa
- /*
- * Compare x0 against revision r4p0
- */
- mov x17, x30
- bl check_errata_1868343
- cbz x0, 1f
- mrs x1, RAINIER_CPUACTLR_EL1
- orr x1, x1, RAINIER_CPUACTLR_EL1_BIT_13
- msr RAINIER_CPUACTLR_EL1, x1
- isb
-1:
- ret x17
-endfunc errata_n1_1868343_wa
-
-func check_errata_1868343
- /* Applies to r0p0 of Rainier CPU */
- mov x1, #0x00
- b cpu_rev_var_ls
-endfunc check_errata_1868343
+ /* Rainier R0P0 is based on Neoverse N1 R4P0. */
+workaround_reset_start rainier, ERRATUM(1868343), ERRATA_N1_1868343
+ sysreg_bit_set RAINIER_CPUACTLR_EL1, RAINIER_CPUACTLR_EL1_BIT_13
+workaround_reset_end rainier, ERRATUM(1868343)
-func rainier_reset_func
- mov x19, x30
+check_erratum_ls rainier, ERRATUM(1868343), CPU_REV(0, 0)
+cpu_reset_func_start rainier
bl rainier_disable_speculative_loads
-
/* Forces all cacheable atomic instructions to be near */
- mrs x0, RAINIER_CPUACTLR2_EL1
- orr x0, x0, #RAINIER_CPUACTLR2_EL1_BIT_2
- msr RAINIER_CPUACTLR2_EL1, x0
- isb
-
- bl cpu_get_rev_var
- mov x18, x0
-
-#if ERRATA_N1_1868343
- mov x0, x18
- bl errata_n1_1868343_wa
-#endif
+ sysreg_bit_set RAINIER_CPUACTLR2_EL1, RAINIER_CPUACTLR2_EL1_BIT_2
#if ENABLE_FEAT_AMU
/* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */
- mrs x0, actlr_el3
- orr x0, x0, #RAINIER_ACTLR_AMEN_BIT
- msr actlr_el3, x0
+ sysreg_bit_set actlr_el3, RAINIER_ACTLR_AMEN_BIT
/* Make sure accesses from EL0/EL1 are not trapped to EL2 */
- mrs x0, actlr_el2
- orr x0, x0, #RAINIER_ACTLR_AMEN_BIT
- msr actlr_el2, x0
+ sysreg_bit_set actlr_el2, RAINIER_ACTLR_AMEN_BIT
/* Enable group0 counters */
mov x0, #RAINIER_AMU_GROUP0_MASK
msr CPUAMCNTENSET_EL0, x0
#endif
-
- isb
- ret x19
-endfunc rainier_reset_func
+cpu_reset_func_end rainier
/* ---------------------------------------------
* HW will do the cache maintenance while powering down
@@ -123,33 +75,12 @@
* Enable CPU power down bit in power control register
* ---------------------------------------------
*/
- mrs x0, RAINIER_CPUPWRCTLR_EL1
- orr x0, x0, #RAINIER_CORE_PWRDN_EN_MASK
- msr RAINIER_CPUPWRCTLR_EL1, x0
+ sysreg_bit_set RAINIER_CPUPWRCTLR_EL1, RAINIER_CORE_PWRDN_EN_MASK
isb
ret
endfunc rainier_core_pwr_dwn
-#if REPORT_ERRATA
-/*
- * Errata printing function for Rainier. Must follow AAPCS.
- */
-func rainier_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_N1_1868343, rainier, 1868343
-
- ldp x8, x30, [sp], #16
- ret
-endfunc rainier_errata_report
-#endif
+errata_report_shim rainier
/* ---------------------------------------------
* This function provides Rainier specific