diff options
Diffstat (limited to 'target/ppc/timebase_helper.c')
| -rw-r--r-- | target/ppc/timebase_helper.c | 356 |
1 files changed, 325 insertions, 31 deletions
diff --git a/target/ppc/timebase_helper.c b/target/ppc/timebase_helper.c index 8ff4080eb9..39d397416e 100644 --- a/target/ppc/timebase_helper.c +++ b/target/ppc/timebase_helper.c @@ -18,6 +18,7 @@ */ #include "qemu/osdep.h" #include "cpu.h" +#include "hw/ppc/ppc.h" #include "exec/helper-proto.h" #include "exec/exec-all.h" #include "qemu/log.h" @@ -59,29 +60,55 @@ target_ulong helper_load_purr(CPUPPCState *env) void helper_store_purr(CPUPPCState *env, target_ulong val) { - cpu_ppc_store_purr(env, val); -} -#endif + CPUState *cs = env_cpu(env); + CPUState *ccs; + uint32_t nr_threads = cs->nr_threads; -target_ulong helper_load_601_rtcl(CPUPPCState *env) -{ - return cpu_ppc601_load_rtcl(env); -} + if (nr_threads == 1 || !(env->flags & POWERPC_FLAG_SMT_1LPAR)) { + cpu_ppc_store_purr(env, val); + return; + } -target_ulong helper_load_601_rtcu(CPUPPCState *env) -{ - return cpu_ppc601_load_rtcu(env); + THREAD_SIBLING_FOREACH(cs, ccs) { + CPUPPCState *cenv = &POWERPC_CPU(ccs)->env; + cpu_ppc_store_purr(cenv, val); + } } +#endif #if !defined(CONFIG_USER_ONLY) void helper_store_tbl(CPUPPCState *env, target_ulong val) { - cpu_ppc_store_tbl(env, val); + CPUState *cs = env_cpu(env); + CPUState *ccs; + uint32_t nr_threads = cs->nr_threads; + + if (nr_threads == 1 || !(env->flags & POWERPC_FLAG_SMT_1LPAR)) { + cpu_ppc_store_tbl(env, val); + return; + } + + THREAD_SIBLING_FOREACH(cs, ccs) { + CPUPPCState *cenv = &POWERPC_CPU(ccs)->env; + cpu_ppc_store_tbl(cenv, val); + } } void helper_store_tbu(CPUPPCState *env, target_ulong val) { - cpu_ppc_store_tbu(env, val); + CPUState *cs = env_cpu(env); + CPUState *ccs; + uint32_t nr_threads = cs->nr_threads; + + if (nr_threads == 1 || !(env->flags & POWERPC_FLAG_SMT_1LPAR)) { + cpu_ppc_store_tbu(env, val); + return; + } + + THREAD_SIBLING_FOREACH(cs, ccs) { + CPUPPCState *cenv = &POWERPC_CPU(ccs)->env; + cpu_ppc_store_tbu(cenv, val); + } } void helper_store_atbl(CPUPPCState *env, target_ulong val) @@ -94,16 +121,6 @@ void helper_store_atbu(CPUPPCState *env, target_ulong val) cpu_ppc_store_atbu(env, val); } -void helper_store_601_rtcl(CPUPPCState *env, target_ulong val) -{ - cpu_ppc601_store_rtcl(env, val); -} - -void helper_store_601_rtcu(CPUPPCState *env, target_ulong val) -{ - cpu_ppc601_store_rtcu(env, val); -} - target_ulong helper_load_decr(CPUPPCState *env) { return cpu_ppc_load_decr(env); @@ -121,17 +138,53 @@ target_ulong helper_load_hdecr(CPUPPCState *env) void helper_store_hdecr(CPUPPCState *env, target_ulong val) { - cpu_ppc_store_hdecr(env, val); + CPUState *cs = env_cpu(env); + CPUState *ccs; + uint32_t nr_threads = cs->nr_threads; + + if (nr_threads == 1 || !(env->flags & POWERPC_FLAG_SMT_1LPAR)) { + cpu_ppc_store_hdecr(env, val); + return; + } + + THREAD_SIBLING_FOREACH(cs, ccs) { + CPUPPCState *cenv = &POWERPC_CPU(ccs)->env; + cpu_ppc_store_hdecr(cenv, val); + } } void helper_store_vtb(CPUPPCState *env, target_ulong val) { - cpu_ppc_store_vtb(env, val); + CPUState *cs = env_cpu(env); + CPUState *ccs; + uint32_t nr_threads = cs->nr_threads; + + if (nr_threads == 1 || !(env->flags & POWERPC_FLAG_SMT_1LPAR)) { + cpu_ppc_store_vtb(env, val); + return; + } + + THREAD_SIBLING_FOREACH(cs, ccs) { + CPUPPCState *cenv = &POWERPC_CPU(ccs)->env; + cpu_ppc_store_vtb(cenv, val); + } } void helper_store_tbu40(CPUPPCState *env, target_ulong val) { - cpu_ppc_store_tbu40(env, val); + CPUState *cs = env_cpu(env); + CPUState *ccs; + uint32_t nr_threads = cs->nr_threads; + + if (nr_threads == 1 || !(env->flags & POWERPC_FLAG_SMT_1LPAR)) { + cpu_ppc_store_tbu40(env, val); + return; + } + + THREAD_SIBLING_FOREACH(cs, ccs) { + CPUPPCState *cenv = &POWERPC_CPU(ccs)->env; + cpu_ppc_store_tbu40(cenv, val); + } } target_ulong helper_load_40x_pit(CPUPPCState *env) @@ -144,6 +197,16 @@ void helper_store_40x_pit(CPUPPCState *env, target_ulong val) store_40x_pit(env, val); } +void helper_store_40x_tcr(CPUPPCState *env, target_ulong val) +{ + store_40x_tcr(env, val); +} + +void helper_store_40x_tsr(CPUPPCState *env, target_ulong val) +{ + store_40x_tsr(env, val); +} + void helper_store_booke_tcr(CPUPPCState *env, target_ulong val) { store_booke_tcr(env, val); @@ -153,6 +216,236 @@ void helper_store_booke_tsr(CPUPPCState *env, target_ulong val) { store_booke_tsr(env, val); } + +#if defined(TARGET_PPC64) +/* + * POWER processor Timebase Facility + */ + +/* + * The TBST is the timebase state machine, which is a per-core machine that + * is used to synchronize the core TB with the ChipTOD. States 3,4,5 are + * not used in POWER8/9/10. + * + * The state machine gets driven by writes to TFMR SPR from the core, and + * by signals from the ChipTOD. The state machine table for common + * transitions is as follows (according to hardware specs, not necessarily + * this implementation): + * + * | Cur | Event | New | + * +----------------+----------------------------------+-----+ + * | 0 RESET | TFMR |= LOAD_TOD_MOD | 1 | + * | 1 SEND_TOD_MOD | "immediate transition" | 2 | + * | 2 NOT_SET | mttbu/mttbu40/mttbl | 2 | + * | 2 NOT_SET | TFMR |= MOVE_CHIP_TOD_TO_TB | 6 | + * | 6 SYNC_WAIT | "sync pulse from ChipTOD" | 7 | + * | 7 GET_TOD | ChipTOD xscom MOVE_TOD_TO_TB_REG | 8 | + * | 8 TB_RUNNING | mttbu/mttbu40 | 8 | + * | 8 TB_RUNNING | TFMR |= LOAD_TOD_MOD | 1 | + * | 8 TB_RUNNING | mttbl | 9 | + * | 9 TB_ERROR | TFMR |= CLEAR_TB_ERRORS | 0 | + * + * - LOAD_TOD_MOD will also move states 2,6 to state 1, omitted from table + * because it's not a typical init flow. + * + * - The ERROR state can be entered from most/all other states on invalid + * states (e.g., if some TFMR control bit is set from a state where it's + * not listed to cause a transition away from), omitted to avoid clutter. + * + * Note: mttbl causes a timebase error because this inevitably causes + * ticks to be lost and TB to become unsynchronized, whereas TB can be + * adjusted using mttbu* without losing ticks. mttbl behaviour is not + * modelled. + * + * Note: the TB state machine does not actually cause any real TB adjustment! + * TB starts out synchronized across all vCPUs (hardware threads) in + * QMEU, so for now the purpose of the TBST and ChipTOD model is simply + * to step through firmware initialisation sequences. + */ +static unsigned int tfmr_get_tb_state(uint64_t tfmr) +{ + return (tfmr & TFMR_TBST_ENCODED) >> (63 - 31); +} + +static uint64_t tfmr_new_tb_state(uint64_t tfmr, unsigned int tbst) +{ + tfmr &= ~TFMR_TBST_LAST; + tfmr |= (tfmr & TFMR_TBST_ENCODED) >> 4; /* move state to last state */ + tfmr &= ~TFMR_TBST_ENCODED; + tfmr |= (uint64_t)tbst << (63 - 31); /* move new state to state */ + + if (tbst == TBST_TB_RUNNING) { + tfmr |= TFMR_TB_VALID; + } else { + tfmr &= ~TFMR_TB_VALID; + } + + return tfmr; +} + +static void write_tfmr(CPUPPCState *env, target_ulong val) +{ + CPUState *cs = env_cpu(env); + + if (cs->nr_threads == 1) { + env->spr[SPR_TFMR] = val; + } else { + CPUState *ccs; + THREAD_SIBLING_FOREACH(cs, ccs) { + CPUPPCState *cenv = &POWERPC_CPU(ccs)->env; + cenv->spr[SPR_TFMR] = val; + } + } +} + +static void tb_state_machine_step(CPUPPCState *env) +{ + uint64_t tfmr = env->spr[SPR_TFMR]; + unsigned int tbst = tfmr_get_tb_state(tfmr); + + if (!(tfmr & TFMR_TB_ECLIPZ) || tbst == TBST_TB_ERROR) { + return; + } + + if (env->pnv_tod_tbst.tb_sync_pulse_timer) { + env->pnv_tod_tbst.tb_sync_pulse_timer--; + } else { + tfmr |= TFMR_TB_SYNC_OCCURED; + write_tfmr(env, tfmr); + } + + if (env->pnv_tod_tbst.tb_state_timer) { + env->pnv_tod_tbst.tb_state_timer--; + return; + } + + if (tfmr & TFMR_LOAD_TOD_MOD) { + tfmr &= ~TFMR_LOAD_TOD_MOD; + if (tbst == TBST_GET_TOD) { + tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR); + tfmr |= TFMR_FIRMWARE_CONTROL_ERROR; + } else { + tfmr = tfmr_new_tb_state(tfmr, TBST_SEND_TOD_MOD); + /* State seems to transition immediately */ + tfmr = tfmr_new_tb_state(tfmr, TBST_NOT_SET); + } + } else if (tfmr & TFMR_MOVE_CHIP_TOD_TO_TB) { + if (tbst == TBST_SYNC_WAIT) { + tfmr = tfmr_new_tb_state(tfmr, TBST_GET_TOD); + env->pnv_tod_tbst.tb_state_timer = 3; + } else if (tbst == TBST_GET_TOD) { + if (env->pnv_tod_tbst.tod_sent_to_tb) { + tfmr = tfmr_new_tb_state(tfmr, TBST_TB_RUNNING); + tfmr &= ~TFMR_MOVE_CHIP_TOD_TO_TB; + env->pnv_tod_tbst.tb_ready_for_tod = 0; + env->pnv_tod_tbst.tod_sent_to_tb = 0; + } + } else { + qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: MOVE_CHIP_TOD_TO_TB " + "state machine in invalid state 0x%x\n", tbst); + tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR); + tfmr |= TFMR_FIRMWARE_CONTROL_ERROR; + env->pnv_tod_tbst.tb_ready_for_tod = 0; + } + } + + write_tfmr(env, tfmr); +} + +target_ulong helper_load_tfmr(CPUPPCState *env) +{ + tb_state_machine_step(env); + + return env->spr[SPR_TFMR] | TFMR_TB_ECLIPZ; +} + +void helper_store_tfmr(CPUPPCState *env, target_ulong val) +{ + uint64_t tfmr = env->spr[SPR_TFMR]; + uint64_t clear_on_write; + unsigned int tbst = tfmr_get_tb_state(tfmr); + + if (!(val & TFMR_TB_ECLIPZ)) { + qemu_log_mask(LOG_UNIMP, "TFMR non-ECLIPZ mode not implemented\n"); + tfmr &= ~TFMR_TBST_ENCODED; + tfmr &= ~TFMR_TBST_LAST; + goto out; + } + + /* Update control bits */ + tfmr = (tfmr & ~TFMR_CONTROL_MASK) | (val & TFMR_CONTROL_MASK); + + /* Several bits are clear-on-write, only one is implemented so far */ + clear_on_write = val & TFMR_FIRMWARE_CONTROL_ERROR; + tfmr &= ~clear_on_write; + + /* + * mtspr always clears this. The sync pulse timer makes it come back + * after the second mfspr. + */ + tfmr &= ~TFMR_TB_SYNC_OCCURED; + env->pnv_tod_tbst.tb_sync_pulse_timer = 1; + + if (ppc_cpu_tir(env_archcpu(env)) != 0 && + (val & (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB))) { + qemu_log_mask(LOG_UNIMP, "TFMR timebase state machine can only be " + "driven by thread 0\n"); + goto out; + } + + if (((tfmr | val) & (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB)) == + (TFMR_LOAD_TOD_MOD | TFMR_MOVE_CHIP_TOD_TO_TB)) { + qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: LOAD_TOD_MOD and " + "MOVE_CHIP_TOD_TO_TB both set\n"); + tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR); + tfmr |= TFMR_FIRMWARE_CONTROL_ERROR; + env->pnv_tod_tbst.tb_ready_for_tod = 0; + goto out; + } + + if (tfmr & TFMR_CLEAR_TB_ERRORS) { + /* + * Workbook says TFMR_CLEAR_TB_ERRORS should be written twice. + * This is not simulated/required here. + */ + tfmr = tfmr_new_tb_state(tfmr, TBST_RESET); + tfmr &= ~TFMR_CLEAR_TB_ERRORS; + tfmr &= ~TFMR_LOAD_TOD_MOD; + tfmr &= ~TFMR_MOVE_CHIP_TOD_TO_TB; + tfmr &= ~TFMR_FIRMWARE_CONTROL_ERROR; /* XXX: should this be cleared? */ + env->pnv_tod_tbst.tb_ready_for_tod = 0; + env->pnv_tod_tbst.tod_sent_to_tb = 0; + goto out; + } + + if (tbst == TBST_TB_ERROR) { + qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: mtspr TFMR in TB_ERROR" + " state\n"); + tfmr |= TFMR_FIRMWARE_CONTROL_ERROR; + return; + } + + if (tfmr & TFMR_LOAD_TOD_MOD) { + /* Wait for an arbitrary 3 mfspr until the next state transition. */ + env->pnv_tod_tbst.tb_state_timer = 3; + } else if (tfmr & TFMR_MOVE_CHIP_TOD_TO_TB) { + if (tbst == TBST_NOT_SET) { + tfmr = tfmr_new_tb_state(tfmr, TBST_SYNC_WAIT); + env->pnv_tod_tbst.tb_ready_for_tod = 1; + env->pnv_tod_tbst.tb_state_timer = 3; /* arbitrary */ + } else { + qemu_log_mask(LOG_GUEST_ERROR, "TFMR error: MOVE_CHIP_TOD_TO_TB " + "not in TB not set state 0x%x\n", + tbst); + tfmr = tfmr_new_tb_state(tfmr, TBST_TB_ERROR); + tfmr |= TFMR_FIRMWARE_CONTROL_ERROR; + env->pnv_tod_tbst.tb_ready_for_tod = 0; + } + } + +out: + write_tfmr(env, tfmr); +} #endif /*****************************************************************************/ @@ -171,15 +464,15 @@ target_ulong helper_load_dcr(CPUPPCState *env, target_ulong dcrn) } else { int ret; - qemu_mutex_lock_iothread(); + bql_lock(); ret = ppc_dcr_read(env->dcr_env, (uint32_t)dcrn, &val); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (unlikely(ret != 0)) { qemu_log_mask(LOG_GUEST_ERROR, "DCR read error %d %03x\n", (uint32_t)dcrn, (uint32_t)dcrn); raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_INVAL | - POWERPC_EXCP_PRIV_REG, GETPC()); + POWERPC_EXCP_INVAL_INVAL, GETPC()); } } return val; @@ -194,15 +487,16 @@ void helper_store_dcr(CPUPPCState *env, target_ulong dcrn, target_ulong val) POWERPC_EXCP_INVAL_INVAL, GETPC()); } else { int ret; - qemu_mutex_lock_iothread(); + bql_lock(); ret = ppc_dcr_write(env->dcr_env, (uint32_t)dcrn, (uint32_t)val); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (unlikely(ret != 0)) { qemu_log_mask(LOG_GUEST_ERROR, "DCR write error %d %03x\n", (uint32_t)dcrn, (uint32_t)dcrn); raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_INVAL | - POWERPC_EXCP_PRIV_REG, GETPC()); + POWERPC_EXCP_INVAL_INVAL, GETPC()); } } } +#endif |