diff options
Diffstat (limited to 'src/arch/arm64')
| -rw-r--r-- | src/arch/arm64/armv8/cache.c | 4 | ||||
| -rw-r--r-- | src/arch/arm64/armv8/exception.c | 6 | ||||
| -rw-r--r-- | src/arch/arm64/armv8/lib/pstate.c | 60 | ||||
| -rw-r--r-- | src/arch/arm64/armv8/lib/sysctrl.c | 292 | ||||
| -rw-r--r-- | src/arch/arm64/armv8/lib/tlb.c | 22 | ||||
| -rw-r--r-- | src/arch/arm64/armv8/mmu.c | 2 | ||||
| -rw-r--r-- | src/arch/arm64/boot.c | 19 | ||||
| -rw-r--r-- | src/arch/arm64/include/arch/transition.h | 12 | ||||
| -rw-r--r-- | src/arch/arm64/include/armv8/arch/lib_helpers.h | 265 | ||||
| -rw-r--r-- | src/arch/arm64/transition.c | 65 | ||||
| -rw-r--r-- | src/arch/arm64/transition_asm.S | 2 |
11 files changed, 36 insertions, 713 deletions
diff --git a/src/arch/arm64/armv8/cache.c b/src/arch/arm64/armv8/cache.c index 59d56b2902..2e63db3bbb 100644 --- a/src/arch/arm64/armv8/cache.c +++ b/src/arch/arm64/armv8/cache.c @@ -40,7 +40,7 @@ void tlb_invalidate_all(void) { /* TLBIALL includes dTLB and iTLB on systems that have them. */ - tlbiall_current(); + tlbiall_el3(); dsb(); isb(); } @@ -124,7 +124,7 @@ void dcache_invalidate_by_mva(void const *addr, size_t len) */ void arch_segment_loaded(uintptr_t start, size_t size, int flags) { - uint32_t sctlr = raw_read_sctlr_current(); + uint32_t sctlr = raw_read_sctlr_el3(); if (sctlr & SCTLR_C) dcache_clean_by_mva((void *)start, size); else if (sctlr & SCTLR_I) diff --git a/src/arch/arm64/armv8/exception.c b/src/arch/arm64/armv8/exception.c index c5cbbfea3b..924c344e13 100644 --- a/src/arch/arm64/armv8/exception.c +++ b/src/arch/arm64/armv8/exception.c @@ -79,9 +79,9 @@ static void print_regs(struct exc_state *exc_state) struct regs *regs = &exc_state->regs; printk(BIOS_DEBUG, "ELR = 0x%016llx ESR = 0x%08x\n", - elx->elr, raw_read_esr_current()); + elx->elr, raw_read_esr_el3()); printk(BIOS_DEBUG, "FAR = 0x%016llx SPSR = 0x%08x\n", - raw_read_far_current(), raw_read_spsr_current()); + raw_read_far_el3(), raw_read_spsr_el3()); for (i = 0; i < 30; i += 2) { printk(BIOS_DEBUG, "X%02d = 0x%016llx X%02d = 0x%016llx\n", @@ -188,7 +188,7 @@ static int test_exception_handler(struct exc_state *state, uint64_t vector_id) { /* Update instruction pointer to next instrution. */ state->elx.elr += sizeof(uint32_t); - raw_write_elr_current(state->elx.elr); + raw_write_elr_el3(state->elx.elr); return EXC_RET_HANDLED; } diff --git a/src/arch/arm64/armv8/lib/pstate.c b/src/arch/arm64/armv8/lib/pstate.c index e068031bd2..631974f6e0 100644 --- a/src/arch/arm64/armv8/lib/pstate.c +++ b/src/arch/arm64/armv8/lib/pstate.c @@ -32,12 +32,6 @@ uint32_t raw_read_current_el(void) return current_el; } -uint32_t get_current_el(void) -{ - uint32_t current_el = raw_read_current_el(); - return ((current_el >> CURRENT_EL_SHIFT) & CURRENT_EL_MASK); -} - /* DAIF */ uint32_t raw_read_daif(void) { @@ -164,28 +158,6 @@ void raw_write_elr_el3(uint64_t elr_el3) __asm__ __volatile__("msr ELR_EL3, %0\n\t" : : "r" (elr_el3) : "memory"); } -uint64_t raw_read_elr_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_elr(el); -} - -void raw_write_elr_current(uint64_t elr) -{ - uint32_t el = get_current_el(); - raw_write_elr(elr, el); -} - -uint64_t raw_read_elr(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_elr, elr, uint64_t, el); -} - -void raw_write_elr(uint64_t elr, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_elr, elr, el); -} - /* FPCR */ uint32_t raw_read_fpcr(void) { @@ -320,16 +292,6 @@ void raw_write_sp_el3(uint64_t sp_el3) raw_write_spsel(spsel); } -uint64_t raw_read_sp_elx(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_sp, sp, uint64_t, el); -} - -void raw_write_sp_elx(uint64_t sp_elx, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_sp, sp_elx, el); -} - /* SPSR */ uint32_t raw_read_spsr_abt(void) { @@ -387,28 +349,6 @@ void raw_write_spsr_el3(uint32_t spsr_el3) __asm__ __volatile__("msr SPSR_EL3, %0\n\t" : : "r" ((uint64_t)spsr_el3) : "memory"); } -uint32_t raw_read_spsr_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_spsr(el); -} - -void raw_write_spsr_current(uint32_t spsr) -{ - uint32_t el = get_current_el(); - raw_write_spsr(spsr, el); -} - -uint32_t raw_read_spsr(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_spsr, spsr, uint32_t, el); -} - -void raw_write_spsr(uint32_t spsr, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_spsr, spsr, el); -} - uint32_t raw_read_spsr_fiq(void) { uint64_t spsr_fiq; diff --git a/src/arch/arm64/armv8/lib/sysctrl.c b/src/arch/arm64/armv8/lib/sysctrl.c index ef3b455b65..3e73c30173 100644 --- a/src/arch/arm64/armv8/lib/sysctrl.c +++ b/src/arch/arm64/armv8/lib/sysctrl.c @@ -65,28 +65,6 @@ void raw_write_actlr_el3(uint32_t actlr_el3) __asm__ __volatile__("msr ACTLR_EL3, %0\n\t" : : "r" ((uint64_t)actlr_el3) : "memory"); } -uint32_t raw_read_actlr_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_actlr(el); -} - -void raw_write_actlr_current(uint32_t actlr) -{ - uint32_t el = get_current_el(); - raw_write_actlr(actlr, el); -} - -uint32_t raw_read_actlr(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_actlr, actlr, uint32_t, el); -} - -void raw_write_actlr(uint32_t actlr, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_actlr, actlr, el); -} - /* AFSR0 */ uint32_t raw_read_afsr0_el1(void) { @@ -130,28 +108,6 @@ void raw_write_afsr0_el3(uint32_t afsr0_el3) __asm__ __volatile__("msr AFSR0_EL3, %0\n\t" : : "r" ((uint64_t)afsr0_el3) : "memory"); } -uint32_t raw_read_afsr0_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_afsr0(el); -} - -void raw_write_afsr0_current(uint32_t afsr0) -{ - uint32_t el = get_current_el(); - raw_write_afsr0(afsr0, el); -} - -uint32_t raw_read_afsr0(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_afsr0, afsr0, uint32_t, el); -} - -void raw_write_afsr0(uint32_t afsr0, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_afsr0, afsr0, el); -} - /* AFSR1 */ uint32_t raw_read_afsr1_el1(void) { @@ -195,28 +151,6 @@ void raw_write_afsr1_el3(uint32_t afsr1_el3) __asm__ __volatile__("msr AFSR1_EL3, %0\n\t" : : "r" ((uint64_t)afsr1_el3) : "memory"); } -uint32_t raw_read_afsr1_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_afsr1(el); -} - -void raw_write_afsr1_current(uint32_t afsr1) -{ - uint32_t el = get_current_el(); - raw_write_afsr1(afsr1, el); -} - -uint32_t raw_read_afsr1(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_afsr1, afsr1, uint32_t, el); -} - -void raw_write_afsr1(uint32_t afsr1, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_afsr1, afsr1, el); -} - /* AIDR */ uint32_t raw_read_aidr_el1(void) { @@ -270,28 +204,6 @@ void raw_write_amair_el3(uint64_t amair_el3) __asm__ __volatile__("msr AMAIR_EL3, %0\n\t" : : "r" (amair_el3) : "memory"); } -uint64_t raw_read_amair_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_amair(el); -} - -void raw_write_amair_current(uint64_t amair) -{ - uint32_t el = get_current_el(); - raw_write_amair(amair, el); -} - -uint64_t raw_read_amair(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_amair, amair, uint64_t, el); -} - -void raw_write_amair(uint64_t amair, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_amair, amair, el); -} - /* CCSIDR */ uint32_t raw_read_ccsidr_el1(void) { @@ -424,28 +336,6 @@ void raw_write_esr_el3(uint32_t esr_el3) __asm__ __volatile__("msr ESR_EL3, %0\n\t" : : "r" ((uint64_t)esr_el3) : "memory"); } -uint32_t raw_read_esr_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_esr(el); -} - -void raw_write_esr_current(uint32_t esr) -{ - uint32_t el = get_current_el(); - raw_write_esr(esr, el); -} - -uint32_t raw_read_esr(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_esr, esr, uint32_t, el); -} - -void raw_write_esr(uint32_t esr, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_esr, esr, el); -} - /* FAR */ uint64_t raw_read_far_el1(void) { @@ -489,28 +379,6 @@ void raw_write_far_el3(uint64_t far_el3) __asm__ __volatile__("msr FAR_EL3, %0\n\t" : : "r" (far_el3) : "memory"); } -uint64_t raw_read_far_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_far(el); -} - -void raw_write_far_current(uint64_t far) -{ - uint32_t el = get_current_el(); - raw_write_far(far, el); -} - -uint64_t raw_read_far(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_far, far, uint64_t, el); -} - -void raw_write_far(uint64_t far, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_far, far, el); -} - /* HCR */ uint64_t raw_read_hcr_el2(void) { @@ -579,28 +447,6 @@ void raw_write_mair_el3(uint64_t mair_el3) __asm__ __volatile__("msr MAIR_EL3, %0\n\t" : : "r" (mair_el3) : "memory"); } -uint64_t raw_read_mair_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_mair(el); -} - -void raw_write_mair_current(uint64_t mair) -{ - uint32_t el = get_current_el(); - raw_write_mair(mair, el); -} - -uint64_t raw_read_mair(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_mair, mair, uint64_t, el); -} - -void raw_write_mair(uint64_t mair, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_mair, mair, el); -} - /* MIDR */ uint32_t raw_read_midr_el1(void) { @@ -664,28 +510,6 @@ void raw_write_rmr_el3(uint32_t rmr_el3) __asm__ __volatile__("msr RMR_EL3, %0\n\t" : : "r" ((uint64_t)rmr_el3) : "memory"); } -uint32_t raw_read_rmr_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_rmr(el); -} - -void raw_write_rmr_current(uint32_t rmr) -{ - uint32_t el = get_current_el(); - raw_write_rmr(rmr, el); -} - -uint32_t raw_read_rmr(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_rmr, rmr, uint32_t, el); -} - -void raw_write_rmr(uint32_t rmr, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_rmr, rmr, el); -} - /* RVBAR */ uint64_t raw_read_rvbar_el1(void) { @@ -729,28 +553,6 @@ void raw_write_rvbar_el3(uint64_t rvbar_el3) __asm__ __volatile__("msr RVBAR_EL3, %0\n\t" : : "r" (rvbar_el3) : "memory"); } -uint64_t raw_read_rvbar_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_rvbar(el); -} - -void raw_write_rvbar_current(uint64_t rvbar) -{ - uint32_t el = get_current_el(); - raw_write_rvbar(rvbar, el); -} - -uint64_t raw_read_rvbar(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_rvbar, rvbar, uint64_t, el); -} - -void raw_write_rvbar(uint64_t rvbar, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_rvbar, rvbar, el); -} - /* Scr */ uint32_t raw_read_scr_el3(void) { @@ -809,28 +611,6 @@ void raw_write_sctlr_el3(uint32_t sctlr_el3) __asm__ __volatile__("msr SCTLR_EL3, %0\n\t" : : "r" ((uint64_t)sctlr_el3) : "memory"); } -uint32_t raw_read_sctlr_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_sctlr(el); -} - -void raw_write_sctlr_current(uint32_t sctlr) -{ - uint32_t el = get_current_el(); - raw_write_sctlr(sctlr, el); -} - -uint32_t raw_read_sctlr(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_sctlr, sctlr, uint32_t, el); -} - -void raw_write_sctlr(uint32_t sctlr, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_sctlr, sctlr, el); -} - /* TCR */ uint64_t raw_read_tcr_el1(void) { @@ -874,34 +654,6 @@ void raw_write_tcr_el3(uint32_t tcr_el3) __asm__ __volatile__("msr TCR_EL3, %0\n\t" : : "r" ((uint64_t)tcr_el3) : "memory"); } - -/* - * IMPORTANT: TCR_EL1 is 64-bit whereas TCR_EL2 and TCR_EL3 are 32-bit. Thus, - * 64-bit is used to read/write for tcr_current. tcr_el2 and tcr_el3 handle them - * with appropriate 32-bit types. - */ -uint64_t raw_read_tcr_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_tcr(el); -} - -void raw_write_tcr_current(uint64_t tcr) -{ - uint32_t el = get_current_el(); - raw_write_tcr(tcr, el); -} - -uint64_t raw_read_tcr(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_tcr, tcr, uint64_t, el); -} - -void raw_write_tcr(uint64_t tcr, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_tcr, tcr, el); -} - /* TTBR0 */ uint64_t raw_read_ttbr0_el1(void) { @@ -945,28 +697,6 @@ void raw_write_ttbr0_el3(uint64_t ttbr0_el3) __asm__ __volatile__("msr TTBR0_EL3, %0\n\t" : : "r" (ttbr0_el3) : "memory"); } -uint64_t raw_read_ttbr0_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_ttbr0(el); -} - -void raw_write_ttbr0_current(uint64_t ttbr0) -{ - uint32_t el = get_current_el(); - raw_write_ttbr0(ttbr0, el); -} - -uint64_t raw_read_ttbr0(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_ttbr0, ttbr0, uint64_t, el); -} - -void raw_write_ttbr0(uint64_t ttbr0, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_ttbr0, ttbr0, el); -} - /* TTBR1 */ uint64_t raw_read_ttbr1_el1(void) { @@ -1025,28 +755,6 @@ void raw_write_vbar_el3(uint64_t vbar_el3) __asm__ __volatile__("msr VBAR_EL3, %0\n\t" : : "r" (vbar_el3) : "memory"); } -uint64_t raw_read_vbar_current(void) -{ - uint32_t el = get_current_el(); - return raw_read_vbar(el); -} - -void raw_write_vbar_current(uint64_t vbar) -{ - uint32_t el = get_current_el(); - raw_write_vbar(vbar, el); -} - -uint64_t raw_read_vbar(uint32_t el) -{ - SWITCH_CASE_READ(raw_read_vbar, vbar, uint64_t, el); -} - -void raw_write_vbar(uint64_t vbar, uint32_t el) -{ - SWITCH_CASE_WRITE(raw_write_vbar, vbar, el); -} - uint32_t raw_read_cntfrq_el0(void) { uint64_t cntfrq_el0; diff --git a/src/arch/arm64/armv8/lib/tlb.c b/src/arch/arm64/armv8/lib/tlb.c index d04afcf4ad..b40fb8f135 100644 --- a/src/arch/arm64/armv8/lib/tlb.c +++ b/src/arch/arm64/armv8/lib/tlb.c @@ -37,17 +37,6 @@ void tlbiall_el3(void) __asm__ __volatile__("tlbi alle3\n\t" : : : "memory"); } -void tlbiall_current(void) -{ - uint32_t el = get_current_el(); - tlbiall(el); -} - -void tlbiall(uint32_t el) -{ - SWITCH_CASE_TLBI(tlbiall, el); -} - /* TLBIALLIS */ void tlbiallis_el1(void) { @@ -64,17 +53,6 @@ void tlbiallis_el3(void) __asm__ __volatile__("tlbi alle3is\n\t" : : : "memory"); } -void tlbiallis_current(void) -{ - uint32_t el = get_current_el(); - tlbiallis(el); -} - -void tlbiallis(uint32_t el) -{ - SWITCH_CASE_TLBI(tlbiallis, el); -} - /* TLBIVAA */ void tlbivaa_el1(uint64_t va) { diff --git a/src/arch/arm64/armv8/mmu.c b/src/arch/arm64/armv8/mmu.c index 606a9b30ad..742f097d0d 100644 --- a/src/arch/arm64/armv8/mmu.c +++ b/src/arch/arm64/armv8/mmu.c @@ -242,7 +242,7 @@ void mmu_config_range(void *start, size_t size, uint64_t tag) /* ARMv8 MMUs snoop L1 data cache, no need to flush it. */ dsb(); - tlbiall_current(); + tlbiall_el3(); dsb(); isb(); } diff --git a/src/arch/arm64/boot.c b/src/arch/arm64/boot.c index 5fd46a7ebd..95c51d3842 100644 --- a/src/arch/arm64/boot.c +++ b/src/arch/arm64/boot.c @@ -36,23 +36,8 @@ static void run_payload(struct prog *prog) if (IS_ENABLED(CONFIG_ARM64_USE_ARM_TRUSTED_FIRMWARE)) arm_tf_run_bl31((u64)doit, (u64)arg, payload_spsr); - else { - uint8_t current_el = get_current_el(); - - printk(BIOS_SPEW, "entry = %p\n", doit); - - /* If current EL is not EL3, jump to payload at same EL. */ - if (current_el != EL3) - doit(arg); - else { - /* If current EL is EL3, we transition to payload in EL2. */ - struct exc_state exc_state; - memset(&exc_state, 0, sizeof(exc_state)); - exc_state.elx.spsr = payload_spsr; - - transition_with_entry(doit, arg, &exc_state); - } - } + else + transition_to_el2(doit, arg, payload_spsr); } void arch_prog_run(struct prog *prog) diff --git a/src/arch/arm64/include/arch/transition.h b/src/arch/arm64/include/arch/transition.h index 5cd73c15d8..290265edb0 100644 --- a/src/arch/arm64/include/arch/transition.h +++ b/src/arch/arm64/include/arch/transition.h @@ -163,16 +163,10 @@ static inline uint8_t get_mode_from_spsr(uint64_t spsr) */ /* - * User of transition library can make a call to transition_with_entry and pass - * the entry point and its argument which are put into elr and x0 by this - * function. After that it makes a call to transition. + * Transitions to EL2 with given entry point and argument in X0. SPSR can be + * partially configured, but the exception level given must be EL2. */ -void transition_with_entry(void *entry, void *arg, struct exc_state *exc_state); -/* - * transition function sets up all the registers as per the struct elx_state - * before jumping to trans_switch. - */ -void transition(struct exc_state *exc_state); +void transition_to_el2(void *entry, void *arg, uint64_t spsr); /* * exc_exit it called while returning from an exception. It expects pointer to diff --git a/src/arch/arm64/include/armv8/arch/lib_helpers.h b/src/arch/arm64/include/armv8/arch/lib_helpers.h index d2d30e12aa..e810098490 100644 --- a/src/arch/arm64/include/armv8/arch/lib_helpers.h +++ b/src/arch/arm64/include/armv8/arch/lib_helpers.h @@ -136,210 +136,17 @@ #define CPACR_TRAP_FP_EL0 (1 << CPACR_FPEN_SHIFT) #define CPACR_TRAP_FP_DISABLE (3 << CPACR_FPEN_SHIFT) -#ifdef __ASSEMBLER__ - -/* Macro to switch to label based on current el */ -.macro switch_el xreg label1 label2 label3 - mrs \xreg, CurrentEL - /* Currently at EL1 */ - cmp \xreg, #(EL1 << CURRENT_EL_SHIFT) - b.eq \label1 - /* Currently at EL2 */ - cmp \xreg, #(EL2 << CURRENT_EL_SHIFT) - b.eq \label2 - /* Currently at EL3 */ - cmp \xreg, #(EL3 << CURRENT_EL_SHIFT) - b.eq \label3 -.endm - -/* Macro to read sysreg at current EL - xreg - reg in which read value needs to be stored - sysreg - system reg that is to be read -*/ -.macro read_current xreg sysreg - switch_el \xreg, 101f, 102f, 103f -101: - mrs \xreg, \sysreg\()_el1 - b 104f -102: - mrs \xreg, \sysreg\()_el2 - b 104f -103: - mrs \xreg, \sysreg\()_el3 - b 104f -104: -.endm - -/* Macro to write sysreg at current EL - xreg - reg from which value needs to be written - sysreg - system reg that is to be written - temp - temp reg that can be used to read current EL -*/ -.macro write_current sysreg xreg temp - switch_el \temp, 101f, 102f, 103f -101: - msr \sysreg\()_el1, \xreg - b 104f -102: - msr \sysreg\()_el2, \xreg - b 104f -103: - msr \sysreg\()_el3, \xreg - b 104f -104: -.endm - -/* Macro to read sysreg at current EL - 1 - xreg - reg in which read value needs to be stored - sysreg - system reg that is to be read -*/ -.macro read_lower xreg sysreg - switch_el \xreg, 101f, 102f, 103f -101: - b 104f -102: - mrs \xreg, \sysreg\()_el1 - b 104f -103: - mrs \xreg, \sysreg\()_el2 - b 104f -104: -.endm - -/* Macro to write sysreg at current EL - 1 - xreg - reg from which value needs to be written - sysreg - system reg that is to be written - temp - temp reg that can be used to read current EL -*/ -.macro write_lower sysreg xreg temp - switch_el \temp, 101f, 102f, 103f -101: - b 104f -102: - msr \sysreg\()_el1, \xreg - b 104f -103: - msr \sysreg\()_el2, \xreg - b 104f -104: -.endm - -/* Macro to read from a register at EL3 only if we are currently at that - level. This is required to ensure that we do not attempt to read registers - from a level lower than el3. e.g. SCR is available for read only at EL3. - IMPORTANT: if EL != EL3, macro silently doesn't perform the read. -*/ -.macro read_el3 xreg sysreg - switch_el \xreg, 402f, 402f, 401f -401: - mrs \xreg, \sysreg\()_el3 -402: -.endm - -/* Macro to write to a register at EL3 only if we are currently at that - level. This is required to ensure that we do not attempt to write to - registers from a level lower than el3. e.g. SCR is available to write only at - EL3. - IMPORTANT: if EL != EL3, macro silently doesn't perform the write. -*/ -.macro write_el3 sysreg xreg temp - switch_el \temp, 402f, 402f, 401f -401: - msr \sysreg\()_el3, \xreg -402: -.endm - -/* Macro to read from an el1 register */ -.macro read_el1 xreg sysreg - mrs \xreg, \sysreg\()_el1 -.endm - -/* Macro to write to an el1 register */ -.macro write_el1 sysreg xreg temp - msr \sysreg\()_el1, \xreg -.endm - -/* Macro to read from an el0 register */ -.macro read_el0 xreg sysreg - mrs \xreg, \sysreg\()_el0 -.endm - -/* Macro to write to an el0 register */ -.macro write_el0 sysreg xreg temp - msr \sysreg\()_el0, \xreg -.endm - -/* Macro to invalidate all stage 1 TLB entries for current EL */ -.macro tlbiall_current temp - switch_el \temp, 401f, 402f, 403f -401: - tlbi alle1 - b 404f -402: - tlbi alle2 - b 404f -403: - tlbi alle3 - b 404f -404: -.endm - -#else - -#include <stdint.h> - #define DAIF_DBG_BIT (1<<3) #define DAIF_ABT_BIT (1<<2) #define DAIF_IRQ_BIT (1<<1) #define DAIF_FIQ_BIT (1<<0) -#define SWITCH_CASE_READ(func, var, type, el) do { \ - type var = -1; \ - switch(el) { \ - case EL1: \ - var = func##_el1(); \ - break; \ - case EL2: \ - var = func##_el2(); \ - break; \ - case EL3: \ - var = func##_el3(); \ - break; \ - } \ - return var; \ - } while (0) +#ifndef __ASSEMBLER__ -#define SWITCH_CASE_WRITE(func, var, el) do { \ - switch(el) { \ - case EL1: \ - func##_el1(var); \ - break; \ - case EL2: \ - func##_el2(var); \ - break; \ - case EL3: \ - func##_el3(var); \ - break; \ - } \ - } while (0) - -#define SWITCH_CASE_TLBI(func, el) do { \ - switch(el) { \ - case EL1: \ - func##_el1(); \ - break; \ - case EL2: \ - func##_el2(); \ - break; \ - case EL3: \ - func##_el3(); \ - break; \ - } \ - } while (0) +#include <stdint.h> /* PSTATE and special purpose register access functions */ uint32_t raw_read_current_el(void); -uint32_t get_current_el(void); uint32_t raw_read_daif(void); void raw_write_daif(uint32_t daif); void enable_debug_exceptions(void); @@ -360,10 +167,6 @@ uint64_t raw_read_elr_el2(void); void raw_write_elr_el2(uint64_t elr_el2); uint64_t raw_read_elr_el3(void); void raw_write_elr_el3(uint64_t elr_el3); -uint64_t raw_read_elr_current(void); -void raw_write_elr_current(uint64_t elr); -uint64_t raw_read_elr(uint32_t el); -void raw_write_elr(uint64_t elr, uint32_t el); uint32_t raw_read_fpcr(void); void raw_write_fpcr(uint32_t fpcr); uint32_t raw_read_fpsr(void); @@ -380,8 +183,6 @@ uint32_t raw_read_spsel(void); void raw_write_spsel(uint32_t spsel); uint64_t raw_read_sp_el3(void); void raw_write_sp_el3(uint64_t sp_el3); -uint64_t raw_read_sp_elx(uint32_t el); -void raw_write_sp_elx(uint64_t sp_elx, uint32_t el); uint32_t raw_read_spsr_abt(void); void raw_write_spsr_abt(uint32_t spsr_abt); uint32_t raw_read_spsr_el1(void); @@ -390,10 +191,6 @@ uint32_t raw_read_spsr_el2(void); void raw_write_spsr_el2(uint32_t spsr_el2); uint32_t raw_read_spsr_el3(void); void raw_write_spsr_el3(uint32_t spsr_el3); -uint32_t raw_read_spsr_current(void); -void raw_write_spsr_current(uint32_t spsr); -uint32_t raw_read_spsr(uint32_t el); -void raw_write_spsr(uint32_t spsr, uint32_t el); uint32_t raw_read_spsr_fiq(void); void raw_write_spsr_fiq(uint32_t spsr_fiq); uint32_t raw_read_spsr_irq(void); @@ -408,30 +205,18 @@ uint32_t raw_read_actlr_el2(void); void raw_write_actlr_el2(uint32_t actlr_el2); uint32_t raw_read_actlr_el3(void); void raw_write_actlr_el3(uint32_t actlr_el3); -uint32_t raw_read_actlr_current(void); -void raw_write_actlr_current(uint32_t actlr); -uint32_t raw_read_actlr(uint32_t el); -void raw_write_actlr(uint32_t actlr, uint32_t el); uint32_t raw_read_afsr0_el1(void); void raw_write_afsr0_el1(uint32_t afsr0_el1); uint32_t raw_read_afsr0_el2(void); void raw_write_afsr0_el2(uint32_t afsr0_el2); uint32_t raw_read_afsr0_el3(void); void raw_write_afsr0_el3(uint32_t afsr0_el3); -uint32_t raw_read_afsr0_current(void); -void raw_write_afsr0_current(uint32_t afsr0); -uint32_t raw_read_afsr0(uint32_t el); -void raw_write_afsr0(uint32_t afsr0, uint32_t el); uint32_t raw_read_afsr1_el1(void); void raw_write_afsr1_el1(uint32_t afsr1_el1); uint32_t raw_read_afsr1_el2(void); void raw_write_afsr1_el2(uint32_t afsr1_el2); uint32_t raw_read_afsr1_el3(void); void raw_write_afsr1_el3(uint32_t afsr1_el3); -uint32_t raw_read_afsr1_current(void); -void raw_write_afsr1_current(uint32_t afsr1); -uint32_t raw_read_afsr1(uint32_t el); -void raw_write_afsr1(uint32_t afsr1, uint32_t el); uint32_t raw_read_aidr_el1(void); uint64_t raw_read_amair_el1(void); void raw_write_amair_el1(uint64_t amair_el1); @@ -439,10 +224,6 @@ uint64_t raw_read_amair_el2(void); void raw_write_amair_el2(uint64_t amair_el2); uint64_t raw_read_amair_el3(void); void raw_write_amair_el3(uint64_t amair_el3); -uint64_t raw_read_amair_current(void); -void raw_write_amair_current(uint64_t amair); -uint64_t raw_read_amair(uint32_t el); -void raw_write_amair(uint64_t amair, uint32_t el); uint32_t raw_read_ccsidr_el1(void); uint32_t raw_read_clidr_el1(void); uint32_t raw_read_cpacr_el1(void); @@ -451,8 +232,6 @@ uint32_t raw_read_cptr_el2(void); void raw_write_cptr_el2(uint32_t cptr_el2); uint32_t raw_read_cptr_el3(void); void raw_write_cptr_el3(uint32_t cptr_el3); -uint32_t raw_read_cptr_current(void); -void raw_write_cptr_current(uint32_t cptr); uint32_t raw_read_csselr_el1(void); void raw_write_csselr_el1(uint32_t csselr_el1); uint32_t raw_read_ctr_el0(void); @@ -462,20 +241,12 @@ uint32_t raw_read_esr_el2(void); void raw_write_esr_el2(uint32_t esr_el2); uint32_t raw_read_esr_el3(void); void raw_write_esr_el3(uint32_t esr_el3); -uint32_t raw_read_esr_current(void); -void raw_write_esr_current(uint32_t esr); -uint32_t raw_read_esr(uint32_t el); -void raw_write_esr(uint32_t esr, uint32_t el); uint64_t raw_read_far_el1(void); void raw_write_far_el1(uint64_t far_el1); uint64_t raw_read_far_el2(void); void raw_write_far_el2(uint64_t far_el2); uint64_t raw_read_far_el3(void); void raw_write_far_el3(uint64_t far_el3); -uint64_t raw_read_far_current(void); -void raw_write_far_current(uint64_t far); -uint64_t raw_read_far(uint32_t el); -void raw_write_far(uint64_t far, uint32_t el); uint64_t raw_read_hcr_el2(void); void raw_write_hcr_el2(uint64_t hcr_el2); uint64_t raw_read_aa64pfr0_el1(void); @@ -485,10 +256,6 @@ uint64_t raw_read_mair_el2(void); void raw_write_mair_el2(uint64_t mair_el2); uint64_t raw_read_mair_el3(void); void raw_write_mair_el3(uint64_t mair_el3); -uint64_t raw_read_mair_current(void); -void raw_write_mair_current(uint64_t mair); -uint64_t raw_read_mair(uint32_t el); -void raw_write_mair(uint64_t mair, uint32_t el); uint32_t raw_read_midr_el1(void); uint64_t raw_read_mpidr_el1(void); uint32_t raw_read_rmr_el1(void); @@ -497,20 +264,12 @@ uint32_t raw_read_rmr_el2(void); void raw_write_rmr_el2(uint32_t rmr_el2); uint32_t raw_read_rmr_el3(void); void raw_write_rmr_el3(uint32_t rmr_el3); -uint32_t raw_read_rmr_current(void); -void raw_write_rmr_current(uint32_t rmr); -uint32_t raw_read_rmr(uint32_t el); -void raw_write_rmr(uint32_t rmr, uint32_t el); uint64_t raw_read_rvbar_el1(void); void raw_write_rvbar_el1(uint64_t rvbar_el1); uint64_t raw_read_rvbar_el2(void); void raw_write_rvbar_el2(uint64_t rvbar_el2); uint64_t raw_read_rvbar_el3(void); void raw_write_rvbar_el3(uint64_t rvbar_el3); -uint64_t raw_read_rvbar_current(void); -void raw_write_rvbar_current(uint64_t rvbar); -uint64_t raw_read_rvbar(uint32_t el); -void raw_write_rvbar(uint64_t rvbar, uint32_t el); uint32_t raw_read_scr_el3(void); void raw_write_scr_el3(uint32_t scr_el3); uint32_t raw_read_sctlr_el1(void); @@ -519,30 +278,18 @@ uint32_t raw_read_sctlr_el2(void); void raw_write_sctlr_el2(uint32_t sctlr_el2); uint32_t raw_read_sctlr_el3(void); void raw_write_sctlr_el3(uint32_t sctlr_el3); -uint32_t raw_read_sctlr_current(void); -void raw_write_sctlr_current(uint32_t sctlr); -uint32_t raw_read_sctlr(uint32_t el); -void raw_write_sctlr(uint32_t sctlr, uint32_t el); uint64_t raw_read_tcr_el1(void); void raw_write_tcr_el1(uint64_t tcr_el1); uint32_t raw_read_tcr_el2(void); void raw_write_tcr_el2(uint32_t tcr_el2); uint32_t raw_read_tcr_el3(void); void raw_write_tcr_el3(uint32_t tcr_el3); -uint64_t raw_read_tcr_current(void); -void raw_write_tcr_current(uint64_t tcr); -uint64_t raw_read_tcr(uint32_t el); -void raw_write_tcr(uint64_t tcr, uint32_t el); uint64_t raw_read_ttbr0_el1(void); void raw_write_ttbr0_el1(uint64_t ttbr0_el1); uint64_t raw_read_ttbr0_el2(void); void raw_write_ttbr0_el2(uint64_t ttbr0_el2); uint64_t raw_read_ttbr0_el3(void); void raw_write_ttbr0_el3(uint64_t ttbr0_el3); -uint64_t raw_read_ttbr0_current(void); -void raw_write_ttbr0_current(uint64_t ttbr0); -uint64_t raw_read_ttbr0(uint32_t el); -void raw_write_ttbr0(uint64_t ttbr0, uint32_t el); uint64_t raw_read_ttbr1_el1(void); void raw_write_ttbr1_el1(uint64_t ttbr1_el1); uint64_t raw_read_vbar_el1(void); @@ -551,10 +298,6 @@ uint64_t raw_read_vbar_el2(void); void raw_write_vbar_el2(uint64_t vbar_el2); uint64_t raw_read_vbar_el3(void); void raw_write_vbar_el3(uint64_t vbar_el3); -uint64_t raw_read_vbar_current(void); -void raw_write_vbar_current(uint64_t vbar); -uint64_t raw_read_vbar(uint32_t el); -void raw_write_vbar(uint64_t vbar, uint32_t el); uint32_t raw_read_cntfrq_el0(void); void raw_write_cntfrq_el0(uint32_t cntfrq_el0); uint64_t raw_read_cntpct_el0(void); @@ -576,13 +319,9 @@ void icivau(uint64_t ivau); void tlbiall_el1(void); void tlbiall_el2(void); void tlbiall_el3(void); -void tlbiall_current(void); -void tlbiall(uint32_t el); void tlbiallis_el1(void); void tlbiallis_el2(void); void tlbiallis_el3(void); -void tlbiallis_current(void); -void tlbiallis(uint32_t el); void tlbivaa_el1(uint64_t va); #endif /* __ASSEMBLER__ */ diff --git a/src/arch/arm64/transition.c b/src/arch/arm64/transition.c index c549c5f26e..ee5e57036a 100644 --- a/src/arch/arm64/transition.c +++ b/src/arch/arm64/transition.c @@ -38,62 +38,41 @@ void exc_entry(struct exc_state *exc_state, uint64_t id) { struct elx_state *elx = &exc_state->elx; struct regs *regs = &exc_state->regs; - uint8_t elx_mode, elx_el; + uint8_t elx_mode; - elx->spsr = raw_read_spsr_current(); + elx->spsr = raw_read_spsr_el3(); elx_mode = get_mode_from_spsr(elx->spsr); - elx_el = get_el_from_spsr(elx->spsr); - - if (elx_mode == SPSR_USE_H) { - if (elx_el == get_current_el()) - regs->sp = (uint64_t)&exc_state[1]; - else - regs->sp = raw_read_sp_elx(elx_el); - } else { + + if (elx_mode == SPSR_USE_H) + regs->sp = (uint64_t)&exc_state[1]; + else regs->sp = raw_read_sp_el0(); - } - elx->elr = raw_read_elr_current(); + elx->elr = raw_read_elr_el3(); exc_dispatch(exc_state, id); } -void transition_with_entry(void *entry, void *arg, struct exc_state *exc_state) -{ - /* Argument to entry point goes into X0 */ - exc_state->regs.x[X0_INDEX] = (uint64_t)arg; - /* Entry point goes into ELR */ - exc_state->elx.elr = (uint64_t)entry; - - transition(exc_state); -} - -void transition(struct exc_state *exc_state) +void transition_to_el2(void *entry, void *arg, uint64_t spsr) { - uint64_t sctlr; - uint32_t current_el = get_current_el(); + struct exc_state exc_state; + struct elx_state *elx = &exc_state.elx; + struct regs *regs = &exc_state.regs; + uint32_t sctlr; - struct elx_state *elx = &exc_state->elx; - struct regs *regs = &exc_state->regs; - - uint8_t elx_el = get_el_from_spsr(elx->spsr); + regs->x[X0_INDEX] = (uint64_t)arg; + elx->elr = (uint64_t)entry; + elx->spsr = spsr; /* * Policies enforced: - * 1. We support only elx --> (elx - 1) transitions + * 1. We support only transitions to EL2 * 2. We support transitions to Aarch64 mode only * * If any of the above conditions holds false, then we need a proper way * to update SCR/HCR before removing the checks below */ - if ((current_el - elx_el) != 1) - die("ARM64 Error: Do not support transition\n"); - - if (elx->spsr & SPSR_ERET_32) - die("ARM64 Error: Do not support eret to Aarch32\n"); - - /* Most parts of coreboot currently don't support EL2 anyway. */ - assert(current_el == EL3); + assert(get_el_from_spsr(spsr) == EL2 && !(spsr & SPSR_ERET_32)); /* Initialize SCR with defaults for running without secure monitor. */ raw_write_scr_el3(SCR_TWE_DISABLE | /* don't trap WFE */ @@ -114,16 +93,16 @@ void transition(struct exc_state *exc_state) CPTR_EL3_TFP_DISABLE); /* ELR/SPSR: Write entry point and processor state of program */ - raw_write_elr_current(elx->elr); - raw_write_spsr_current(elx->spsr); + raw_write_elr_el3(elx->elr); + raw_write_spsr_el3(elx->spsr); /* SCTLR: Initialize EL with selected properties */ - sctlr = raw_read_sctlr(elx_el); + sctlr = raw_read_sctlr_el2(); sctlr &= SCTLR_MASK; - raw_write_sctlr(sctlr, elx_el); + raw_write_sctlr_el2(sctlr); /* SP_ELx: Initialize stack pointer */ - raw_write_sp_elx(elx->sp_elx, elx_el); + raw_write_sp_el2(elx->sp_elx); /* Payloads expect to be entered with MMU disabled. Includes an ISB. */ mmu_disable(); diff --git a/src/arch/arm64/transition_asm.S b/src/arch/arm64/transition_asm.S index 924a4bc388..73821c85dd 100644 --- a/src/arch/arm64/transition_asm.S +++ b/src/arch/arm64/transition_asm.S @@ -164,7 +164,7 @@ ENTRY(exception_init_asm) msr SPSel, #SPSR_USE_L adr x0, exc_vectors - write_current vbar, x0, x1 + msr vbar_el3, x0 dsb sy isb ret |