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ACPI: Add SMI_CMD and PM1_CNT_BLK I/O ports
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@joncampbell123
joncampbell123 committed Mar 20, 2024
1 parent 63b3ba3 commit 9a75ec7
Showing 1 changed file with 152 additions and 2 deletions.
154 changes: 152 additions & 2 deletions src/ints/bios.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,7 @@ extern bool PS1AudioCard;

unsigned char ACPI_ENABLE_CMD = 0xA1;
unsigned char ACPI_DISABLE_CMD = 0xA0;
unsigned int ACPI_IO_BASE = 0x820;
unsigned int ACPI_PM1A_EVT_BLK = 0x820;
unsigned int ACPI_PM1A_CNT_BLK = 0x824;
unsigned int ACPI_PM_TMR_BLK = 0x830;
Expand Down Expand Up @@ -189,6 +190,125 @@ RegionAllocTracking rombios_alloc;
Bitu rombios_minimum_location = 0xF0000; /* minimum segment allowed */
Bitu rombios_minimum_size = 0x10000;

static bool ACPI_SCI_EN = false;
static bool ACPI_BM_RLD = false;

static IO_Callout_t acpi_iocallout = IO_Callout_t_none;

static unsigned int ACPI_PM1_Enable = 0;
static unsigned int ACPI_PM1_Status = 0;
static constexpr unsigned int ACPI_PM1_Enable_TMR_EN = (1u << 0u);
static constexpr unsigned int ACPI_PM1_Enable_GBL_EN = (1u << 5u);
static constexpr unsigned int ACPI_PM1_Enable_PWRBTN_EN = (1u << 8u);
static constexpr unsigned int ACPI_PM1_Enable_SLPBTN_EN = (1u << 9u);
static constexpr unsigned int ACPI_PM1_Enable_RTC_EN = (1u << 10u);

unsigned int ACPI_buffer_global_lock = 0;

unsigned long ACPI_FACS_GlobalLockValue(void) {
if (ACPI_buffer && ACPI_buffer_global_lock != 0)
return host_readd(ACPI_buffer+ACPI_buffer_global_lock);

return 0;
}

/* Triggered by GBL_RLS bit */
static void ACPI_OnGuestGlobalRelease(void) {
LOG(LOG_MISC,LOG_DEBUG)("ACPI GBL_RLS event. Global lock = %lx",ACPI_FACS_GlobalLockValue());
}

static void acpi_cb_port_smi_cmd_w(Bitu port,Bitu val,Bitu iolen) {
/* 8-bit SMI_CMD port */
LOG(LOG_MISC,LOG_DEBUG)("ACPI SMI_CMD %x",(unsigned int)val);

if (val == ACPI_ENABLE_CMD) {
if (!ACPI_SCI_EN) {
LOG(LOG_MISC,LOG_DEBUG)("Guest enabled ACPI");
ACPI_SCI_EN = true;
}
}
else if (val == ACPI_DISABLE_CMD) {
if (ACPI_SCI_EN) {
LOG(LOG_MISC,LOG_DEBUG)("Guest disabled ACPI");
ACPI_SCI_EN = false;
}
}
}

static Bitu acpi_cb_port_cnt_blk_r(Bitu port,Bitu /*iolen*/) {
/* 16-bit register (PM1_CNT_LEN == 2) */
Bitu ret = 0;
if (ACPI_SCI_EN) ret |= (1u << 0u);
if (ACPI_BM_RLD) ret |= (1u << 1u);
/* GBL_RLS is write only */
/* TODO: bits 3-8 are "reserved by the ACPI driver"? So are they writeable then? */
/* TODO: SLP_TYPx */
/* SLP_EN is write-only */

ret >>= (Bitu)((port & 1u) * 8u);
LOG(LOG_MISC,LOG_DEBUG)("ACPI_PM1_CNT_BLK read port %x ret %x",(unsigned int)port,(unsigned int)ret);
return ret;
}

static void acpi_cb_port_cnt_blk_w(Bitu port,Bitu val,Bitu iolen) {
/* 16-bit register (PM1_CNT_LEN == 2) */
const unsigned int pmask = ((1u << (unsigned int)iolen) - 1u) << ((unsigned int)port & 1u);/*which bits are actually updated*/
LOG(LOG_MISC,LOG_DEBUG)("ACPI_PM1_CNT_BLK write port %x val %x iolen %x pmask %x",(unsigned int)port,(unsigned int)val,(unsigned int)iolen,pmask);

if (pmask & 1) {
/* BIOS controls SCI_EN and therefore guest cannot change it */
ACPI_BM_RLD = !!(val & (1u << 1u));
/* GLB_RLS is write only and triggers an SMI interrupt to pass execution to the BIOS, usually to indicate a release of the global lock and set of pending bit */
if (val & (1u << 2u)/*GBL_RLS*/) ACPI_OnGuestGlobalRelease();
}
/* TODO: bits 3-8 are "reserved by the ACPI driver"? So are they writeable then? */
/* TODO: SLP_TYPx */
/* SLP_EN is write-only */
}

static IO_ReadHandler* acpi_cb_port_r(IO_CalloutObject &co,Bitu port,Bitu iolen) {
(void)co;
(void)iolen;

if ((port & (~3u)) == ACPI_PM1A_EVT_BLK) {
LOG(LOG_MISC,LOG_DEBUG)("read ACPI_PM1A_EVT_BLK port=0x%x iolen=%u",(unsigned int)port,(unsigned int)iolen);
}
else if ((port & (~1u)) == ACPI_PM1A_CNT_BLK)
return acpi_cb_port_cnt_blk_r;
else if ((port & (~3u)) == ACPI_SMI_CMD) {
LOG(LOG_MISC,LOG_DEBUG)("read ACPI_SMI_CMD port=0x%x iolen=%u",(unsigned int)port,(unsigned int)iolen);
}
else if ((port & (~3u)) == ACPI_PM_TMR_BLK) {
LOG(LOG_MISC,LOG_DEBUG)("read ACPI_PM_TMR_BLK port=0x%x iolen=%u",(unsigned int)port,(unsigned int)iolen);
}
else {
LOG(LOG_MISC,LOG_DEBUG)("read ACPI_??? port=0x%x iolen=%u",(unsigned int)port,(unsigned int)iolen);
}

return NULL;
}

static IO_WriteHandler* acpi_cb_port_w(IO_CalloutObject &co,Bitu port,Bitu iolen) {
(void)co;
(void)iolen;

if ((port & (~3u)) == ACPI_PM1A_EVT_BLK) {
LOG(LOG_MISC,LOG_DEBUG)("write ACPI_PM1A_EVT_BLK port=0x%x iolen=%u",(unsigned int)port,(unsigned int)iolen);
}
else if ((port & (~1u)) == ACPI_PM1A_CNT_BLK)
return acpi_cb_port_cnt_blk_w;
else if ((port & (~3u)) == ACPI_SMI_CMD)
return acpi_cb_port_smi_cmd_w;
else if ((port & (~3u)) == ACPI_PM_TMR_BLK) {
LOG(LOG_MISC,LOG_DEBUG)("write ACPI_PM_TMR_BLK port=0x%x iolen=%u",(unsigned int)port,(unsigned int)iolen);
}
else {
LOG(LOG_MISC,LOG_DEBUG)("write ACPI_??? port=0x%x iolen=%u",(unsigned int)port,(unsigned int)iolen);
}

return NULL;
}

bool MEM_map_ROM_physmem(Bitu start,Bitu end);
bool MEM_unmap_physmem(Bitu start,Bitu end);

Expand Down Expand Up @@ -8834,6 +8954,7 @@ void BuildACPITable(void) {
host_writed(facs+0x04,facs_size);
host_writed(facs+0x08,0x12345678UL); // hardware signature
host_writed(facs+0x0C,0); // firmware waking vector
ACPI_buffer_global_lock = acpiptr2ofs(facs+0x10);
host_writed(facs+0x10,0); // global lock
host_writed(facs+0x14,0); // S4BIOS_REQ not supported
LOG(LOG_MISC,LOG_DEBUG)("ACPI: FACS at 0x%lx len 0x%lx",(unsigned long)acpiofs2phys( acpiptr2ofs( facs ) ),(unsigned long)facs_size);
Expand Down Expand Up @@ -9015,6 +9136,10 @@ class BIOS:public Module_base{
ACPI_enabled = false;
ACPI_version = 0;
ACPI_free();
ACPI_SCI_EN = false;
ACPI_BM_RLD = false;
ACPI_PM1_Status = 0;
ACPI_PM1_Enable = 0;

/* If we're here because of a JMP to F000:FFF0 from a DOS program, then
* an actual reset is needed to prevent reentrancy problems with the DOS
Expand Down Expand Up @@ -9061,7 +9186,8 @@ class BIOS:public Module_base{
/* TODO: Read from dosbox.conf */
if (ACPI_version != 0) {
ACPI_IRQ = 9;
ACPI_SMI_CMD = 0x4FE;
ACPI_IO_BASE = 0x820;
ACPI_SMI_CMD = 0x828;
}
}

Expand Down Expand Up @@ -9383,6 +9509,11 @@ class BIOS:public Module_base{
isapnp_biosstruct_base = 0;
}

if (acpi_iocallout != IO_Callout_t_none) {
IO_FreeCallout(acpi_iocallout);
acpi_iocallout = IO_Callout_t_none;
}

if (BOCHS_PORT_E9) {
delete BOCHS_PORT_E9;
BOCHS_PORT_E9=NULL;
Expand Down Expand Up @@ -10247,7 +10378,21 @@ class BIOS:public Module_base{
}
}

if (ACPI_enabled) BuildACPITable();
if (ACPI_enabled) {
if (acpi_iocallout == IO_Callout_t_none)
acpi_iocallout = IO_AllocateCallout(IO_TYPE_MB);
if (acpi_iocallout == IO_Callout_t_none)
E_Exit("Failed to get ACPI IO callout handle");

{
IO_CalloutObject *obj = IO_GetCallout(acpi_iocallout);
if (obj == NULL) E_Exit("Failed to get ACPI IO callout");
obj->Install(ACPI_IO_BASE,IOMASK_Combine(IOMASK_FULL,IOMASK_Range(0x20)),acpi_cb_port_r,acpi_cb_port_w);
IO_PutCallout(obj);
}

BuildACPITable();
}

CPU_STI();

Expand Down Expand Up @@ -11569,6 +11714,11 @@ class BIOS:public Module_base{
* a page fault. */
CPU_Snap_Back_To_Real_Mode();

if (acpi_iocallout != IO_Callout_t_none) {
IO_FreeCallout(acpi_iocallout);
acpi_iocallout = IO_Callout_t_none;
}

if (BOCHS_PORT_E9) {
delete BOCHS_PORT_E9;
BOCHS_PORT_E9=NULL;
Expand Down

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