diff options
Diffstat (limited to 'lib/cpus/aarch64/cortex_a75.S')
| -rw-r--r-- | lib/cpus/aarch64/cortex_a75.S | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/lib/cpus/aarch64/cortex_a75.S b/lib/cpus/aarch64/cortex_a75.S index 4cab9e4f..e66ad066 100644 --- a/lib/cpus/aarch64/cortex_a75.S +++ b/lib/cpus/aarch64/cortex_a75.S @@ -11,7 +11,120 @@ #include <plat_macros.S> #include <cortex_a75.h> + .globl cortex_a75_amu_cnt_read + .globl cortex_a75_amu_cnt_write + .globl cortex_a75_amu_read_cpuamcntenset_el0 + .globl cortex_a75_amu_read_cpuamcntenclr_el0 + .globl cortex_a75_amu_write_cpuamcntenset_el0 + .globl cortex_a75_amu_write_cpuamcntenclr_el0 + +/* + * uint64_t cortex_a75_amu_cnt_read(int idx); + * + * Given `idx`, read the corresponding AMU counter + * and return it in `x0`. + */ +func cortex_a75_amu_cnt_read + adr x1, 1f + lsl x0, x0, #3 + add x1, x1, x0 + br x1 + +1: + mrs x0, CPUAMEVCNTR0_EL0 + ret + mrs x0, CPUAMEVCNTR1_EL0 + ret + mrs x0, CPUAMEVCNTR2_EL0 + ret + mrs x0, CPUAMEVCNTR3_EL0 + ret + mrs x0, CPUAMEVCNTR4_EL0 + ret +endfunc cortex_a75_amu_cnt_read + +/* + * void cortex_a75_amu_cnt_write(int idx, uint64_t val); + * + * Given `idx`, write `val` to the corresponding AMU counter. + */ +func cortex_a75_amu_cnt_write + adr x2, 1f + lsl x0, x0, #3 + add x2, x2, x0 + br x2 + +1: + msr CPUAMEVCNTR0_EL0, x0 + ret + msr CPUAMEVCNTR1_EL0, x0 + ret + msr CPUAMEVCNTR2_EL0, x0 + ret + msr CPUAMEVCNTR3_EL0, x0 + ret + msr CPUAMEVCNTR4_EL0, x0 + ret +endfunc cortex_a75_amu_cnt_write + +/* + * unsigned int cortex_a75_amu_read_cpuamcntenset_el0(void); + * + * Read the `CPUAMCNTENSET_EL0` CPU register and return + * it in `x0`. + */ +func cortex_a75_amu_read_cpuamcntenset_el0 + mrs x0, CPUAMCNTENSET_EL0 + ret +endfunc cortex_a75_amu_read_cpuamcntenset_el0 + +/* + * unsigned int cortex_a75_amu_read_cpuamcntenclr_el0(void); + * + * Read the `CPUAMCNTENCLR_EL0` CPU register and return + * it in `x0`. + */ +func cortex_a75_amu_read_cpuamcntenclr_el0 + mrs x0, CPUAMCNTENCLR_EL0 + ret +endfunc cortex_a75_amu_read_cpuamcntenclr_el0 + +/* + * void cortex_a75_amu_write_cpuamcntenset_el0(unsigned int mask); + * + * Write `mask` to the `CPUAMCNTENSET_EL0` CPU register. + */ +func cortex_a75_amu_write_cpuamcntenset_el0 + msr CPUAMCNTENSET_EL0, x0 + ret +endfunc cortex_a75_amu_write_cpuamcntenset_el0 + +/* + * void cortex_a75_amu_write_cpuamcntenclr_el0(unsigned int mask); + * + * Write `mask` to the `CPUAMCNTENCLR_EL0` CPU register. + */ +func cortex_a75_amu_write_cpuamcntenclr_el0 + mrs x0, CPUAMCNTENCLR_EL0 + ret +endfunc cortex_a75_amu_write_cpuamcntenclr_el0 + func cortex_a75_reset_func +#if IMAGE_BL31 && WORKAROUND_CVE_2017_5715 + mrs x0, id_aa64pfr0_el1 + ubfx x0, x0, #ID_AA64PFR0_CSV2_SHIFT, #ID_AA64PFR0_CSV2_LENGTH + /* + * If the field equals to 1 then branch targets trained in one + * context cannot affect speculative execution in a different context. + */ + cmp x0, #1 + beq 1f + + adr x0, workaround_bpiall_vbar0_runtime_exceptions + msr vbar_el3, x0 +1: +#endif + #if ENABLE_AMU /* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */ mrs x0, actlr_el3 |