[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PULL 14/46] target/arm: Split out aarch32_cpsr_valid_mask
From: |
Peter Maydell |
Subject: |
[PULL 14/46] target/arm: Split out aarch32_cpsr_valid_mask |
Date: |
Thu, 13 Feb 2020 14:41:13 +0000 |
From: Richard Henderson <address@hidden>
Split this helper out of msr_mask in translate.c. At the same time,
transform the negative reductive logic to positive accumulative logic.
It will be usable along the exception paths.
While touching msr_mask, fix up formatting.
Signed-off-by: Richard Henderson <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
Message-id: address@hidden
Signed-off-by: Peter Maydell <address@hidden>
---
target/arm/internals.h | 21 +++++++++++++++++++++
target/arm/translate.c | 40 +++++++++++++++++-----------------------
2 files changed, 38 insertions(+), 23 deletions(-)
diff --git a/target/arm/internals.h b/target/arm/internals.h
index 6be8b2d1a9b..4d4896fcdcf 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1061,6 +1061,27 @@ static inline bool arm_mmu_idx_is_stage1_of_2(ARMMMUIdx
mmu_idx)
}
}
+static inline uint32_t aarch32_cpsr_valid_mask(uint64_t features,
+ const ARMISARegisters *id)
+{
+ uint32_t valid = CPSR_M | CPSR_AIF | CPSR_IL | CPSR_NZCV | CPSR_J;
+
+ if ((features >> ARM_FEATURE_V4T) & 1) {
+ valid |= CPSR_T;
+ }
+ if ((features >> ARM_FEATURE_V5) & 1) {
+ valid |= CPSR_Q; /* V5TE in reality*/
+ }
+ if ((features >> ARM_FEATURE_V6) & 1) {
+ valid |= CPSR_E | CPSR_GE;
+ }
+ if ((features >> ARM_FEATURE_THUMB2) & 1) {
+ valid |= CPSR_IT;
+ }
+
+ return valid;
+}
+
/*
* Parameters of a given virtual address, as extracted from the
* translation control register (TCR) for a given regime.
diff --git a/target/arm/translate.c b/target/arm/translate.c
index d58c328e08e..20f89ace2fd 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -2734,39 +2734,33 @@ static inline void gen_mulxy(TCGv_i32 t0, TCGv_i32 t1,
int x, int y)
/* Return the mask of PSR bits set by a MSR instruction. */
static uint32_t msr_mask(DisasContext *s, int flags, int spsr)
{
- uint32_t mask;
+ uint32_t mask = 0;
- mask = 0;
- if (flags & (1 << 0))
+ if (flags & (1 << 0)) {
mask |= 0xff;
- if (flags & (1 << 1))
+ }
+ if (flags & (1 << 1)) {
mask |= 0xff00;
- if (flags & (1 << 2))
+ }
+ if (flags & (1 << 2)) {
mask |= 0xff0000;
- if (flags & (1 << 3))
+ }
+ if (flags & (1 << 3)) {
mask |= 0xff000000;
+ }
- /* Mask out undefined bits. */
- mask &= ~CPSR_RESERVED;
- if (!arm_dc_feature(s, ARM_FEATURE_V4T)) {
- mask &= ~CPSR_T;
- }
- if (!arm_dc_feature(s, ARM_FEATURE_V5)) {
- mask &= ~CPSR_Q; /* V5TE in reality*/
- }
- if (!arm_dc_feature(s, ARM_FEATURE_V6)) {
- mask &= ~(CPSR_E | CPSR_GE);
- }
- if (!arm_dc_feature(s, ARM_FEATURE_THUMB2)) {
- mask &= ~CPSR_IT;
- }
- /* Mask out execution state and reserved bits. */
+ /* Mask out undefined and reserved bits. */
+ mask &= aarch32_cpsr_valid_mask(s->features, s->isar);
+
+ /* Mask out execution state. */
if (!spsr) {
- mask &= ~(CPSR_EXEC | CPSR_RESERVED);
+ mask &= ~CPSR_EXEC;
}
+
/* Mask out privileged bits. */
- if (IS_USER(s))
+ if (IS_USER(s)) {
mask &= CPSR_USER;
+ }
return mask;
}
--
2.20.1
- [PULL 04/46] arm/virt/acpi: remove meaningless sub device "RP0" from PCI0, (continued)
- [PULL 04/46] arm/virt/acpi: remove meaningless sub device "RP0" from PCI0, Peter Maydell, 2020/02/13
- [PULL 03/46] bios-tables-test: prepare to change ARM virt ACPI DSDT, Peter Maydell, 2020/02/13
- [PULL 02/46] i.MX: Add support for WDT on i.MX6, Peter Maydell, 2020/02/13
- [PULL 06/46] arm/acpi: fix PCI _PRT definition, Peter Maydell, 2020/02/13
- [PULL 05/46] arm/virt/acpi: remove _ADR from devices identified by _HID, Peter Maydell, 2020/02/13
- [PULL 07/46] arm/acpi: fix duplicated _UID of PCI interrupt link devices, Peter Maydell, 2020/02/13
- [PULL 08/46] arm/acpi: simplify the description of PCI _CRS, Peter Maydell, 2020/02/13
- [PULL 09/46] virt/acpi: update golden masters for DSDT update, Peter Maydell, 2020/02/13
- [PULL 12/46] target/arm: Add isar_feature tests for PAN + ATS1E1, Peter Maydell, 2020/02/13
- [PULL 10/46] target/arm: Add arm_mmu_idx_is_stage1_of_2, Peter Maydell, 2020/02/13
- [PULL 14/46] target/arm: Split out aarch32_cpsr_valid_mask,
Peter Maydell <=
- [PULL 15/46] target/arm: Mask CPSR_J when Jazelle is not enabled, Peter Maydell, 2020/02/13
- [PULL 11/46] target/arm: Add mmu_idx for EL1 and EL2 w/ PAN enabled, Peter Maydell, 2020/02/13
- [PULL 19/46] target/arm: Introduce aarch64_pstate_valid_mask, Peter Maydell, 2020/02/13
- [PULL 16/46] target/arm: Replace CPSR_ERET_MASK with aarch32_cpsr_valid_mask, Peter Maydell, 2020/02/13
- [PULL 22/46] target/arm: Enforce PAN semantics in get_S1prot, Peter Maydell, 2020/02/13
- [PULL 17/46] target/arm: Use aarch32_cpsr_valid_mask in helper_exception_return, Peter Maydell, 2020/02/13
- [PULL 18/46] target/arm: Remove CPSR_RESERVED, Peter Maydell, 2020/02/13
- [PULL 21/46] target/arm: Update arm_mmu_idx_el for PAN, Peter Maydell, 2020/02/13
- [PULL 20/46] target/arm: Update MSR access for PAN, Peter Maydell, 2020/02/13
- [PULL 13/46] target/arm: Move LOR regdefs to file scope, Peter Maydell, 2020/02/13