diff options
| -rw-r--r-- | hw/ssi/aspeed_smc.c | 40 | ||||
| -rw-r--r-- | include/hw/ssi/aspeed_smc.h | 1 |
2 files changed, 29 insertions, 12 deletions
diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c index e3fdc66cb2..033cbbb59b 100644 --- a/hw/ssi/aspeed_smc.c +++ b/hw/ssi/aspeed_smc.c @@ -417,7 +417,7 @@ static void aspeed_smc_flash_do_select(AspeedSMCFlash *fl, bool unselect) AspeedSMCState *s = fl->controller; trace_aspeed_smc_flash_select(fl->cs, unselect ? "un" : ""); - + s->unselect = unselect; qemu_set_irq(s->cs_lines[fl->cs], unselect); } @@ -677,22 +677,35 @@ static const MemoryRegionOps aspeed_smc_flash_ops = { static void aspeed_smc_flash_update_ctrl(AspeedSMCFlash *fl, uint32_t value) { AspeedSMCState *s = fl->controller; - bool unselect; + bool unselect = false; + uint32_t old_mode; + uint32_t new_mode; + + old_mode = s->regs[s->r_ctrl0 + fl->cs] & CTRL_CMD_MODE_MASK; + new_mode = value & CTRL_CMD_MODE_MASK; - /* User mode selects the CS, other modes unselect */ - unselect = (value & CTRL_CMD_MODE_MASK) != CTRL_USERMODE; + if (old_mode == CTRL_USERMODE) { + if (new_mode != CTRL_USERMODE) { + unselect = true; + } - /* A change of CTRL_CE_STOP_ACTIVE from 0 to 1, unselects the CS */ - if (!(s->regs[s->r_ctrl0 + fl->cs] & CTRL_CE_STOP_ACTIVE) && - value & CTRL_CE_STOP_ACTIVE) { - unselect = true; + /* A change of CTRL_CE_STOP_ACTIVE from 0 to 1, unselects the CS */ + if (!(s->regs[s->r_ctrl0 + fl->cs] & CTRL_CE_STOP_ACTIVE) && + value & CTRL_CE_STOP_ACTIVE) { + unselect = true; + } + } else { + if (new_mode != CTRL_USERMODE) { + unselect = true; + } } s->regs[s->r_ctrl0 + fl->cs] = value; - s->snoop_index = unselect ? SNOOP_OFF : SNOOP_START; - - aspeed_smc_flash_do_select(fl, unselect); + if (unselect != s->unselect) { + s->snoop_index = unselect ? SNOOP_OFF : SNOOP_START; + aspeed_smc_flash_do_select(fl, unselect); + } } static void aspeed_smc_reset(DeviceState *d) @@ -729,6 +742,8 @@ static void aspeed_smc_reset(DeviceState *d) qemu_set_irq(s->cs_lines[i], true); } + s->unselect = true; + /* setup the default segment register values and regions for all */ for (i = 0; i < asc->cs_num_max; ++i) { aspeed_smc_flash_set_segment_region(s, i, @@ -1261,12 +1276,13 @@ static void aspeed_smc_realize(DeviceState *dev, Error **errp) static const VMStateDescription vmstate_aspeed_smc = { .name = "aspeed.smc", - .version_id = 2, + .version_id = 3, .minimum_version_id = 2, .fields = (const VMStateField[]) { VMSTATE_UINT32_ARRAY(regs, AspeedSMCState, ASPEED_SMC_R_MAX), VMSTATE_UINT8(snoop_index, AspeedSMCState), VMSTATE_UINT8(snoop_dummies, AspeedSMCState), + VMSTATE_BOOL_V(unselect, AspeedSMCState, 3), VMSTATE_END_OF_LIST() } }; diff --git a/include/hw/ssi/aspeed_smc.h b/include/hw/ssi/aspeed_smc.h index 234dca32b0..25b95e7406 100644 --- a/include/hw/ssi/aspeed_smc.h +++ b/include/hw/ssi/aspeed_smc.h @@ -82,6 +82,7 @@ struct AspeedSMCState { uint8_t snoop_index; uint8_t snoop_dummies; + bool unselect; }; typedef struct AspeedSegments { |