* redistribute, and modify it as specified in the file "V3VEE_LICENSE".
*/
-#include <devices/8254.h>
+
#include <palacios/vmm.h>
+#include <palacios/vmm_dev_mgr.h>
#include <palacios/vmm_time.h>
#include <palacios/vmm_util.h>
#include <palacios/vmm_intr.h>
+#include <palacios/vmm_config.h>
+#include <palacios/vmm_io.h>
-
-#ifndef DEBUG_PIT
+#ifndef V3_CONFIG_DEBUG_PIT
#undef PrintDebug
#define PrintDebug(fmt, args...)
#endif
#define CHANNEL1_PORT 0x41
#define CHANNEL2_PORT 0x42
#define COMMAND_PORT 0x43
+#define SPEAKER_PORT 0x61
#define PIT_INTR_NUM 0
+#define PIT_SPEAKER_GATE 0x01
/* The order of these typedefs is important because the numerical values correspond to the
* values coming from the io ports
*/
typedef enum {NOT_RUNNING, PENDING, RUNNING} channel_run_state_t;
typedef enum {NOT_WAITING, WAITING_LOBYTE, WAITING_HIBYTE} channel_access_state_t;
-typedef enum {LATCH_COUNT, LOBYTE_ONLY, HIBYTE_ONLY, LOBYTE_HIBYTE} channel_access_mode_t;
-typedef enum {IRQ_ON_TERM_CNT, ONE_SHOT, RATE_GEN, SQR_WAVE, SW_STROBE, HW_STROBE} channel_op_mode_t;
+typedef enum {LATCH_COUNT = 0, LOBYTE_ONLY = 1, HIBYTE_ONLY = 2, LOBYTE_HIBYTE = 3} channel_access_mode_t;
+typedef enum {IRQ_ON_TERM_CNT = 0, ONE_SHOT = 1, RATE_GEN = 2, SQR_WAVE = 3, SW_STROBE = 4, HW_STROBE = 5} channel_op_mode_t;
struct channel {
- channel_access_mode_t access_mode;
- channel_access_state_t access_state;
- channel_run_state_t run_state;
+ channel_access_mode_t access_mode;
+ channel_access_state_t access_state;
+ channel_run_state_t run_state;
- channel_op_mode_t op_mode;
+ channel_op_mode_t op_mode;
- // Time til interrupt trigger
+ // Time til interrupt trigger
- ushort_t counter;
- ushort_t reload_value;
+ ushort_t counter;
+ ushort_t reload_value;
- ushort_t latched_value;
+ ushort_t latched_value;
- enum {NOTLATCHED, LATCHED} latch_state;
+ enum {NOTLATCHED, LATCHED} latch_state;
- enum {LSB, MSB} read_state;
+ enum {LSB, MSB} read_state;
- uint_t output_pin : 1;
- uint_t gate_input_pin : 1;
+ uint_t output_pin : 1;
+ uint_t gate_input_pin : 1;
};
struct pit {
- ullong_t pit_counter;
- ullong_t pit_reload;
+ ullong_t pit_counter;
+ ullong_t pit_reload;
+
+ struct v3_timer * timer;
+ struct v3_vm_info * vm;
- struct channel ch_0;
- struct channel ch_1;
- struct channel ch_2;
+ struct channel ch_0;
+ struct channel ch_1;
+ struct channel ch_2;
+ uint8_t speaker;
};
struct pit_cmd_word {
- uint_t bcd_mode : 1;
- uint_t op_mode : 3;
- uint_t access_mode : 2;
- uint_t channel : 2;
+ uint_t bcd_mode : 1;
+ uint_t op_mode : 3;
+ uint_t access_mode : 2;
+ uint_t channel : 2;
};
struct pit_rdb_cmd_word {
- uint_t rsvd : 1; // SBZ
- uint_t ch_0 : 1;
- uint_t ch_1 : 1;
- uint_t ch_2 : 1;
- uint_t latch_status : 1;
- uint_t latch_count : 1;
- uint_t readback_cmd : 2; // Must Be 0x3
+ uint_t rsvd : 1; // SBZ
+ uint_t ch_0 : 1;
+ uint_t ch_1 : 1;
+ uint_t ch_2 : 1;
+ uint_t latch_status : 1;
+ uint_t latch_count : 1;
+ uint_t readback_cmd : 2; // Must Be 0x3
};
struct pit_rdb_status_word {
- uint_t bcd_mode : 1;
- uint_t op_mode : 3;
- uint_t access_mode : 2;
- uint_t null_count : 1;
- uint_t pin_state : 1;
+ uint_t bcd_mode : 1;
+ uint_t op_mode : 3;
+ uint_t access_mode : 2;
+ uint_t null_count : 1;
+ uint_t pin_state : 1;
};
* This should call out to handle_SQR_WAVE_tics, etc...
*/
// Returns true if the the output signal changed state
-static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint_t oscillations) {
- uint_t channel_cycles = 0;
- uint_t output_changed = 0;
+static int handle_crystal_tics(struct pit * pit, struct channel * ch, uint_t oscillations) {
+ uint_t channel_cycles = 0;
+ uint_t output_changed = 0;
- // PrintDebug("8254 PIT: %d crystal tics\n", oscillations);
- if (ch->run_state == PENDING) {
- oscillations--;
- ch->counter = ch->reload_value;
+ // PrintDebug(info->vm_info, info, "8254 PIT (channel %d): %d crystal tics\n",
+ // ch - pit->ch0, oscillations);
+ if (ch->run_state == PENDING) {
+ oscillations--;
+ ch->counter = ch->reload_value;
+
+ if (ch->op_mode == SQR_WAVE) {
+ ch->counter -= ch->counter % 2;
+ }
- if (ch->op_mode == SQR_WAVE) {
- ch->counter -= ch->counter % 2;
+ ch->run_state = RUNNING;
+ } else if (ch->run_state != RUNNING) {
+ return output_changed;
}
- ch->run_state = RUNNING;
- } else if (ch->run_state != RUNNING) {
- return output_changed;
- }
-
- /*
- PrintDebug("8254 PIT: Channel Run State = %d, counter=", ch->run_state);
- PrintTraceLL(ch->counter);
- PrintDebug("\n");
- */
- if (ch->op_mode == SQR_WAVE) {
- oscillations *= 2;
- }
-
- if (ch->counter > oscillations) {
- ch->counter -= oscillations;
- return output_changed;
- } else {
- ushort_t reload_val = ch->reload_value;
- oscillations -= ch->counter;
- ch->counter = 0;
- channel_cycles = 1;
-
-
+ /*
+ PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: Channel Run State = %d, counter=", ch->run_state);
+ PrintTraceLL(ch->counter);
+ PrintDebug(VM_NONE, VCORE_NONE, "\n");
+ */
if (ch->op_mode == SQR_WAVE) {
- reload_val -= reload_val % 2;
+ oscillations *= 2;
}
-
- channel_cycles += oscillations / reload_val;
- oscillations = oscillations % reload_val;
- ch->counter = reload_val - oscillations;
- }
+ if (ch->counter > oscillations) {
+ ch->counter -= oscillations;
+ //PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: Counter at %u after %u oscillations.\n",
+ // (unsigned int)ch->counter, oscillations);
+ return output_changed;
+ } else {
+ ushort_t reload_val = ch->reload_value;
- // PrintDebug("8254 PIT: Channel Cycles: %d\n", channel_cycles);
-
+ if ((ch->op_mode == SW_STROBE) || (ch->op_mode == IRQ_ON_TERM_CNT)) {
+ reload_val = 0xffff;
+ }
+ oscillations -= ch->counter;
+ ch->counter = 0;
+ channel_cycles = 1;
- switch (ch->op_mode) {
- case IRQ_ON_TERM_CNT:
- if ((channel_cycles > 0) && (ch->output_pin == 0)) {
- ch->output_pin = 1;
- output_changed = 1;
- }
- break;
- case ONE_SHOT:
- if ((channel_cycles > 0) && (ch->output_pin == 0)) {
- ch->output_pin = 1;
- output_changed = 1;
- }
- break;
- case RATE_GEN:
- // See the data sheet: we ignore the output pin cycle...
- if (channel_cycles > 0) {
- output_changed = 1;
- }
- break;
- case SQR_WAVE:
- ch->output_pin = (ch->output_pin + 1) % 2;
+ if (ch->op_mode == SQR_WAVE) {
+ reload_val -= reload_val % 2;
+ }
+
+ if (reload_val == 0) {
+ // This means the value is being set to 0x10000
+ // but due to the tick after the reload, it wraps
+ // down to 0xffff
+ reload_val = 0xffff;
+ }
+
+ channel_cycles += oscillations / reload_val;
+ oscillations = oscillations % reload_val;
+
+ ch->counter = reload_val - oscillations;
+ // PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: Counter reset to %u.\n",
+ // (unsigned int)ch->counter);
- if (ch->output_pin == 1) {
- output_changed = 1;
}
- break;
- case SW_STROBE:
- return -1;
- break;
- case HW_STROBE:
- return -1;
- break;
- default:
- break;
- }
+ //PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: Channel %ld (mode = %u) Cycles: %d\n",
+ //(ch - &pit->ch_0), ch->op_mode, channel_cycles);
+
+ switch (ch->op_mode) {
+ case IRQ_ON_TERM_CNT:
+ if (channel_cycles > 0) {
+ if (ch->output_pin == 0) {
+ ch->output_pin = 1;
+ output_changed = 1;
+ } else {
+ // PrintDebug(VM_NONE, VCORE_NONE, "8254: Output not changed in TERM_CNT mode.\n");
+ }
+ }
+ break;
+ case ONE_SHOT:
+ if (channel_cycles > 0) {
+ if ((ch->output_pin == 0)) {
+ ch->output_pin = 1;
+ output_changed = 1;
+ } else {
+ // PrintDebug(VM_NONE, VCORE_NONE, "8254: Output not changed in ONE_SHOT mode.\n");
+ }
+ }
+ break;
+ case RATE_GEN:
+ // See the data sheet: we ignore the output pin cycle...
+ if (channel_cycles > 0) {
+ output_changed = 1;
+ }
+ break;
+ case SQR_WAVE:
+ ch->output_pin = (ch->output_pin + 1) % 2;
+
+ if (ch->output_pin == 1) {
+ output_changed = 1;
+ }
+
+
+ break;
+ case SW_STROBE:
+
+ if (channel_cycles > 0) {
+ if (ch->output_pin == 1) {
+ ch->output_pin = 0;
+ output_changed = 1;
+ }
+ }
+ break;
+ case HW_STROBE:
+ PrintError(VM_NONE, VCORE_NONE, "Hardware strobe not implemented\n");
+ return -1;
+ break;
+ default:
+ break;
+ }
- return output_changed;
+ return output_changed;
}
+#include <palacios/vm_guest.h>
-static void pit_update_time(ullong_t cpu_cycles, ullong_t cpu_freq, void * private_data) {
- struct vm_device * dev = (struct vm_device *)private_data;
- struct pit * state = (struct pit *)dev->private_data;
- // ullong_t tmp_ctr = state->pit_counter;
- ullong_t tmp_cycles;
- uint_t oscillations = 0;
+static void pit_update_timer(struct guest_info * info, ullong_t cpu_cycles, ullong_t cpu_freq, void * private_data) {
+ struct pit * state = (struct pit *)private_data;
+ // ullong_t tmp_ctr = state->pit_counter;
+ ullong_t tmp_cycles;
+ uint_t oscillations = 0;
- /*
- PrintDebug("updating cpu_cycles=");
- PrintTraceLL(cpu_cycles);
- PrintDebug("\n");
-
- PrintDebug("pit_counter=");
- PrintTraceLL(state->pit_counter);
- PrintDebug("\n");
+ /*
+ PrintDebug(info->vm_info, info, "updating cpu_cycles=");
+ PrintTraceLL(cpu_cycles);
+ PrintDebug(info->vm_info, info, "\n");
- PrintDebug("pit_reload=");
- PrintTraceLL(state->pit_reload);
- PrintDebug("\n");
- */
-
- if (state->pit_counter > cpu_cycles) {
- // Easy...
- state->pit_counter -= cpu_cycles;
- } else {
+ PrintDebug(info->vm_info, info, "pit_counter=");
+ PrintTraceLL(state->pit_counter);
+ PrintDebug(info->vm_info, info, "\n");
- // Take off the first part
- cpu_cycles -= state->pit_counter;
- state->pit_counter = 0;
- oscillations = 1;
+ PrintDebug(info->vm_info, info, "pit_reload=");
+ PrintTraceLL(state->pit_reload);
+ PrintDebug(info->vm_info, info, "\n");
+ */
+
+ if (state->pit_counter > cpu_cycles) {
+ // Easy...
+ state->pit_counter -= cpu_cycles;
+ } else {
+ ushort_t reload_val = state->pit_reload;
+ // Take off the first part
+ cpu_cycles -= state->pit_counter;
+ state->pit_counter = 0;
+ oscillations = 1;
- if (cpu_cycles > state->pit_reload) {
- // how many full oscillations
- tmp_cycles = cpu_cycles;
+ if (cpu_cycles > state->pit_reload) {
+ // how many full oscillations
+
+ //PrintError(info->vm_info, info, "cpu_cycles = %p, reload = %p...\n",
+ // (void *)(addr_t)cpu_cycles,
+ // (void *)(addr_t)state->pit_reload);
- cpu_cycles = do_divll(tmp_cycles, state->pit_reload);
+ // How do we check for a one shot....
+ if (reload_val == 0) {
+ reload_val = 1;
+ }
- oscillations += tmp_cycles;
- }
+ tmp_cycles = cpu_cycles;
- // update counter with remainder (mod reload)
- state->pit_counter = state->pit_reload - cpu_cycles;
+
+#ifdef __V3_64BIT__
+ cpu_cycles = tmp_cycles % reload_val;
+ tmp_cycles = tmp_cycles / reload_val;
+#else
+ cpu_cycles = do_divll(tmp_cycles, reload_val);
+#endif
+
+ oscillations += tmp_cycles;
+ }
- //PrintDebug("8254 PIT: Handling %d crystal tics\n", oscillations);
- if (handle_crystal_tics(dev, &(state->ch_0), oscillations) == 1) {
- // raise interrupt
- PrintDebug("8254 PIT: Injecting Timer interrupt to guest\n");
- v3_raise_irq(dev->vm, 0);
- }
+ // update counter with remainder (mod reload)
+ state->pit_counter = state->pit_reload - cpu_cycles;
- //handle_crystal_tics(dev, &(state->ch_1), oscillations);
- //handle_crystal_tics(dev, &(state->ch_2), oscillations);
- }
-
+ if (oscillations) {
+ // PrintDebug(info->vm_info, info, "8254 PIT: Handling %d crystal tics\n", oscillations);
+ if (handle_crystal_tics(state, &(state->ch_0), oscillations) == 1) {
+ // raise interrupt
+ PrintDebug(info->vm_info, info, "8254 PIT: Injecting Timer interrupt to guest (run_state = %d)\n",
+ state->ch_0.run_state);
+ v3_raise_irq(info->vm_info, 0);
+ }
+ //handle_crystal_tics(state, &(state->ch_1), oscillations);
+ handle_crystal_tics(state, &(state->ch_2), oscillations);
+ }
+ }
- return;
+ return;
}
-
-
/* This should call out to handle_SQR_WAVE_write, etc...
*/
static int handle_channel_write(struct channel * ch, char val) {
switch (ch->access_state) {
- case WAITING_HIBYTE:
- {
- ushort_t tmp_val = ((ushort_t)val) << 8;
- ch->reload_value &= 0x00ff;
- ch->reload_value |= tmp_val;
+ case WAITING_HIBYTE:
+ {
+ ushort_t tmp_val = ((ushort_t)val) << 8;
+ ch->reload_value &= 0x00ff;
+ ch->reload_value |= tmp_val;
- if ((ch->op_mode != RATE_GEN) || (ch->run_state != RUNNING)){
- ch->run_state = PENDING;
- }
+ if ((ch->op_mode != RATE_GEN) || (ch->run_state != RUNNING)){
+ ch->run_state = PENDING;
+ }
- if (ch->access_mode == LOBYTE_HIBYTE) {
- ch->access_state = WAITING_LOBYTE;
- }
-
- PrintDebug("8254 PIT: updated channel counter: %d\n", ch->reload_value);
- PrintDebug("8254 PIT: Channel Run State=%d\n", ch->run_state);
- break;
- }
- case WAITING_LOBYTE:
- ch->reload_value &= 0xff00;
- ch->reload_value |= val;
+ if (ch->access_mode == LOBYTE_HIBYTE) {
+ ch->access_state = WAITING_LOBYTE;
+ }
+
+ PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: updated channel counter: %d\n", ch->reload_value);
+ PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: Channel Run State=%d\n", ch->run_state);
+ break;
+ }
+ case WAITING_LOBYTE:
+ ch->reload_value &= 0xff00;
+ ch->reload_value |= val;
- if (ch->access_mode == LOBYTE_HIBYTE) {
- ch->access_state = WAITING_HIBYTE;
- } else if ((ch->op_mode != RATE_GEN) || (ch->run_state != RUNNING)) {
- ch->run_state = PENDING;
- }
+ if (ch->access_mode == LOBYTE_HIBYTE) {
+ ch->access_state = WAITING_HIBYTE;
+ } else if ((ch->op_mode != RATE_GEN) || (ch->run_state != RUNNING)) {
+ ch->run_state = PENDING;
+ }
- PrintDebug("8254 PIT: updated channel counter: %d\n", ch->reload_value);
- PrintDebug("8254 PIT: Channel Run State=%d\n", ch->run_state);
- break;
- default:
- return -1;
+ PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: updated channel counter: %d\n", ch->reload_value);
+ PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: Channel Run State=%d\n", ch->run_state);
+ break;
+ default:
+ PrintError(VM_NONE, VCORE_NONE, "Invalid Access state\n");
+ return -1;
}
switch (ch->op_mode) {
- case IRQ_ON_TERM_CNT:
- ch->output_pin = 0;
- break;
- case ONE_SHOT:
- ch->output_pin = 1;
- break;
- case RATE_GEN:
- ch->output_pin = 1;
- break;
- case SQR_WAVE:
- ch->output_pin = 1;
- break;
- default:
- return -1;
- break;
+ case IRQ_ON_TERM_CNT:
+ ch->output_pin = 0;
+ break;
+ case ONE_SHOT:
+ ch->output_pin = 1;
+ break;
+ case RATE_GEN:
+ ch->output_pin = 1;
+ break;
+ case SQR_WAVE:
+ ch->output_pin = 1;
+ break;
+ case SW_STROBE:
+ ch->output_pin = 1;
+ break;
+ default:
+ PrintError(VM_NONE, VCORE_NONE, "Invalid OP_MODE: %d\n", ch->op_mode);
+ return -1;
+ break;
}
- return 0;
+ return 0;
}
static int handle_channel_read(struct channel * ch, char * val) {
- ushort_t * myval;
+ ushort_t * myval;
- if (ch->latch_state == NOTLATCHED) {
- myval = &(ch->counter);
- } else {
- myval = &(ch->latched_value);
- }
+ if (ch->latch_state == NOTLATCHED) {
+ myval = &(ch->counter);
+ } else {
+ myval = &(ch->latched_value);
+ }
- if (ch->read_state == LSB) {
- *val = ((char*)myval)[0]; // little endian
- ch->read_state = MSB;
- } else {
- *val = ((char*)myval)[1];
- ch->read_state = LSB;
- if (ch->latch_state == LATCHED) {
- ch->latch_state = NOTLATCHED;
+ if (ch->read_state == LSB) {
+ *val = ((char*)myval)[0]; // little endian
+ ch->read_state = MSB;
+ } else {
+ *val = ((char*)myval)[1];
+ ch->read_state = LSB;
+ if (ch->latch_state == LATCHED) {
+ ch->latch_state = NOTLATCHED;
+ }
}
- }
- return 0;
+ return 0;
}
+static int handle_speaker_read(uint8_t *speaker, struct channel * ch, char * val) {
+ *val = *speaker;
+ if ((*speaker & PIT_SPEAKER_GATE)) {
+ *val |= (ch->output_pin << 5);
+ }
+
+ return 0;
+}
-
+static int handle_speaker_write(uint8_t *speaker, struct channel * ch, char val) {
+ *speaker = (val & ~0x20);
+ return 0;
+}
static int handle_channel_cmd(struct channel * ch, struct pit_cmd_word cmd) {
- ch->op_mode = cmd.op_mode;
- ch->access_mode = cmd.access_mode;
+ if (cmd.op_mode != ch->op_mode) {
+ PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: Changing channel from op mode %d to op mode %d.\n",
+ ch->op_mode, cmd.op_mode);
+ }
+ if (cmd.access_mode != 0) {
+ ch->op_mode = cmd.op_mode;
+ }
+ if (cmd.access_mode != ch->access_mode) {
+ PrintDebug(VM_NONE, VCORE_NONE, "8254 PIT: Changing channel from access mode %d to access mode %d.\n",
+ ch->access_mode, cmd.access_mode);
+ }
+ ch->access_mode = cmd.access_mode;
+
+ switch (cmd.access_mode) {
+ case LATCH_COUNT:
+ if (ch->latch_state == NOTLATCHED) {
+ ch->latched_value = ch->counter;
+ ch->latch_state = LATCHED;
+ }
+ break;
+ case HIBYTE_ONLY:
+ ch->access_state = WAITING_HIBYTE;
+ break;
+ case LOBYTE_ONLY:
+ case LOBYTE_HIBYTE:
+ ch->access_state = WAITING_LOBYTE;
+ break;
+ }
- switch (cmd.access_mode) {
- case LATCH_COUNT:
- if (ch->latch_state == NOTLATCHED) {
- ch->latched_value = ch->counter;
- ch->latch_state = LATCHED;
+
+ switch (cmd.op_mode) {
+ case IRQ_ON_TERM_CNT:
+ ch->output_pin = 0;
+ break;
+ case ONE_SHOT:
+ ch->output_pin = 1;
+ break;
+ case RATE_GEN:
+ ch->output_pin = 1;
+ break;
+ case SQR_WAVE:
+ ch->output_pin = 1;
+ break;
+ case SW_STROBE:
+ ch->output_pin = 1;
+ break;
+ default:
+ PrintError(VM_NONE, VCORE_NONE, "Invalid OP_MODE: %d\n", cmd.op_mode);
+ return -1;
}
- break;
- case HIBYTE_ONLY:
- ch->access_state = WAITING_HIBYTE;
- break;
- case LOBYTE_ONLY:
- case LOBYTE_HIBYTE:
- ch->access_state = WAITING_LOBYTE;
- break;
- }
-
-
- switch (cmd.op_mode) {
- case IRQ_ON_TERM_CNT:
- ch->output_pin = 0;
- break;
- case ONE_SHOT:
- ch->output_pin = 1;
- break;
- case RATE_GEN:
- ch->output_pin = 1;
- break;
- case SQR_WAVE:
- ch->output_pin = 1;
- break;
- default:
- return -1;
- }
- return 0;
+ return 0;
}
-static int pit_read_channel(ushort_t port, void * dst, uint_t length, struct vm_device * dev) {
- struct pit * state = (struct pit *)dev->private_data;
- char * val = (char *)dst;
-
- if (length != 1) {
- PrintError("8254 PIT: Invalid Read Write length \n");
- return -1;
- }
-
- PrintDebug("8254 PIT: Read of PIT Channel %d\n", port - CHANNEL0_PORT);
+static int pit_read_channel(struct guest_info * core, ushort_t port, void * dst, uint_t length, void * priv_data) {
+ struct pit * state = (struct pit *)priv_data;
+ char * val = (char *)dst;
- switch (port) {
- case CHANNEL0_PORT:
- if (handle_channel_read(&(state->ch_0), val) == -1) {
- return -1;
- }
- break;
- case CHANNEL1_PORT:
- if (handle_channel_read(&(state->ch_1), val) == -1) {
- return -1;
+ if (length != 1) {
+ PrintError(core->vm_info, core, "8254 PIT: Invalid Read Write length \n");
+ return -1;
}
- break;
- case CHANNEL2_PORT:
- if (handle_channel_read(&(state->ch_2), val) == -1) {
- return -1;
+
+ PrintDebug(core->vm_info, core, "8254 PIT: Read of PIT Channel %d\n", port - CHANNEL0_PORT);
+
+ switch (port) {
+ case CHANNEL0_PORT:
+ if (handle_channel_read(&(state->ch_0), val) == -1) {
+ PrintError(core->vm_info, core, "CHANNEL0 read error\n");
+ return -1;
+ }
+ break;
+ case CHANNEL1_PORT:
+ if (handle_channel_read(&(state->ch_1), val) == -1) {
+ PrintError(core->vm_info, core, "CHANNEL1 read error\n");
+ return -1;
+ }
+ break;
+ case CHANNEL2_PORT:
+ if (handle_channel_read(&(state->ch_2), val) == -1) {
+ PrintError(core->vm_info, core, "CHANNEL2 read error\n");
+ return -1;
+ }
+ break;
+ case SPEAKER_PORT:
+ if (handle_speaker_read(&state->speaker, &(state->ch_2), val) == -1) {
+ PrintError(core->vm_info, core, "SPEAKER read error\n");
+ return -1;
+ }
+ break;
+ default:
+ PrintError(core->vm_info, core, "8254 PIT: Read from invalid port (%d)\n", port);
+ return -1;
}
- break;
- default:
- PrintError("8254 PIT: Read from invalid port (%d)\n", port);
- return -1;
- }
- return length;
+ return length;
}
-static int pit_write_channel(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
- struct pit * state = (struct pit *)dev->private_data;
- char val = *(char *)src;
+static int pit_write_channel(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) {
+ struct pit * state = (struct pit *)priv_data;
+ char val = *(char *)src;
- if (length != 1) {
- PrintError("8254 PIT: Invalid Write Length\n");
- return -1;
- }
-
- PrintDebug("8254 PIT: Write to PIT Channel %d (%x)\n", port - CHANNEL0_PORT, *(char*)src);
-
-
- switch (port) {
- case CHANNEL0_PORT:
- if (handle_channel_write(&(state->ch_0), val) == -1) {
- return -1;
- }
- break;
- case CHANNEL1_PORT:
- if (handle_channel_write(&(state->ch_1), val) == -1) {
- return -1;
+ if (length != 1) {
+ PrintError(core->vm_info, core, "8254 PIT: Invalid Write Length\n");
+ return -1;
}
- break;
- case CHANNEL2_PORT:
- if (handle_channel_write(&(state->ch_2), val) == -1) {
- return -1;
+
+ PrintDebug(core->vm_info, core, "8254 PIT: Write to PIT Channel %d (%x)\n", port - CHANNEL0_PORT, *(char*)src);
+
+
+ switch (port) {
+ case CHANNEL0_PORT:
+ if (handle_channel_write(&(state->ch_0), val) == -1) {
+ PrintError(core->vm_info, core, "CHANNEL0 write error\n");
+ return -1;
+ }
+ break;
+ case CHANNEL1_PORT:
+ if (handle_channel_write(&(state->ch_1), val) == -1) {
+ PrintError(core->vm_info, core, "CHANNEL1 write error\n");
+ return -1;
+ }
+ break;
+ case CHANNEL2_PORT:
+ if (handle_channel_write(&(state->ch_2), val) == -1) {
+ PrintError(core->vm_info, core, "CHANNEL2 write error\n");
+ return -1;
+ }
+ break;
+ case SPEAKER_PORT:
+ if (handle_speaker_write(&state->speaker, &(state->ch_2), val) == -1) {
+ PrintError(core->vm_info, core, "SPEAKER write error\n");
+ return -1;
+ }
+ break;
+ default:
+ PrintError(core->vm_info, core, "8254 PIT: Write to invalid port (%d)\n", port);
+ return -1;
}
- break;
- default:
- PrintError("8254 PIT: Write to invalid port (%d)\n", port);
- return -1;
- }
- return length;
+ return length;
}
-static int pit_write_command(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
- struct pit * state = (struct pit *)dev->private_data;
- struct pit_cmd_word * cmd = (struct pit_cmd_word *)src;
-
- PrintDebug("8254 PIT: Write to PIT Command port\n");
- PrintDebug("8254 PIT: Writing to channel %d (access_mode = %d, op_mode = %d)\n", cmd->channel, cmd->access_mode, cmd->op_mode);
- if (length != 1) {
- PrintError("8254 PIT: Write of Invalid length to command port\n");
- return -1;
- }
+static int pit_write_command(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) {
+ struct pit * state = (struct pit *)priv_data;
+ struct pit_cmd_word * cmd = (struct pit_cmd_word *)src;
- switch (cmd->channel) {
- case 0:
- if (handle_channel_cmd(&(state->ch_0), *cmd) == -1) {
- return -1;
- }
- break;
- case 1:
- if (handle_channel_cmd(&(state->ch_1), *cmd) == -1) {
- return -1;
+ PrintDebug(core->vm_info, core, "8254 PIT: Write to PIT Command port\n");
+ PrintDebug(core->vm_info, core, "8254 PIT: Writing to channel %d (access_mode = %d, op_mode = %d)\n", cmd->channel, cmd->access_mode, cmd->op_mode);
+ if (length != 1) {
+ PrintError(core->vm_info, core, "8254 PIT: Write of Invalid length to command port\n");
+ return -1;
}
- break;
- case 2:
- if (handle_channel_cmd(&(state->ch_2), *cmd) == -1) {
- return -1;
+
+ switch (cmd->channel) {
+ case 0:
+ if (handle_channel_cmd(&(state->ch_0), *cmd) == -1) {
+ PrintError(core->vm_info, core, "CHANNEL0 command error\n");
+ return -1;
+ }
+ break;
+ case 1:
+ if (handle_channel_cmd(&(state->ch_1), *cmd) == -1) {
+ PrintError(core->vm_info, core, "CHANNEL1 command error\n");
+ return -1;
+ }
+ break;
+ case 2:
+ if (handle_channel_cmd(&(state->ch_2), *cmd) == -1) {
+ PrintError(core->vm_info, core, "CHANNEL2 command error\n");
+ return -1;
+ }
+ break;
+ case 3:
+ // Read Back command
+ PrintError(core->vm_info, core, "Read back command not implemented\n");
+ return -1;
+ break;
+ default:
+ break;
}
- break;
- case 3:
- // Read Back command
- return -1;
- break;
- default:
- break;
- }
- return length;
+ return length;
}
-static struct vm_timer_ops timer_ops = {
- .update_time = pit_update_time,
+static struct v3_timer_ops timer_ops = {
+ .update_timer = pit_update_timer,
};
static void init_channel(struct channel * ch) {
- ch->run_state = NOT_RUNNING;
- ch->access_state = NOT_WAITING;
- ch->access_mode = 0;
- ch->op_mode = 0;
+ ch->run_state = NOT_RUNNING;
+ ch->access_state = NOT_WAITING;
+ ch->access_mode = 0;
+ ch->op_mode = 0;
- ch->counter = 0;
- ch->reload_value = 0;
- ch->output_pin = 0;
- ch->gate_input_pin = 0;
+ ch->counter = 0;
+ ch->reload_value = 0;
+ ch->output_pin = 0;
+ ch->gate_input_pin = 0;
- ch->latched_value = 0;
- ch->latch_state = NOTLATCHED;
- ch->read_state = LSB;
+ ch->latched_value = 0;
+ ch->latch_state = NOTLATCHED;
+ ch->read_state = LSB;
- return;
+ return;
}
-static int pit_init(struct vm_device * dev) {
- struct pit * state = (struct pit *)dev->private_data;
- uint_t cpu_khz = V3_CPU_KHZ();
- ullong_t reload_val = (ullong_t)cpu_khz * 1000;
- dev_hook_io(dev, CHANNEL0_PORT, &pit_read_channel, &pit_write_channel);
- dev_hook_io(dev, CHANNEL1_PORT, &pit_read_channel, &pit_write_channel);
- dev_hook_io(dev, CHANNEL2_PORT, &pit_read_channel, &pit_write_channel);
- dev_hook_io(dev, COMMAND_PORT, NULL, &pit_write_command);
-#ifdef DEBUG_PIT
- PrintDebug("8254 PIT: OSC_HZ=%d, reload_val=", OSC_HZ);
- PrintTraceLL(reload_val);
- PrintDebug("\n");
-#endif
+static int pit_free(void * private_data) {
+ struct pit * state = (struct pit *)private_data;
+ struct guest_info * info = &(state->vm->cores[0]);
+
+
+ if (state->timer) {
+ v3_remove_timer(info, state->timer);
+ }
+
+ V3_Free(state);
+ return 0;
+}
- v3_add_timer(dev->vm, &timer_ops, dev);
+#ifdef V3_CONFIG_CHECKPOINT
- // Get cpu frequency and calculate the global pit oscilattor counter/cycle
+#include <palacios/vmm_sprintf.h>
- do_divll(reload_val, OSC_HZ);
- state->pit_counter = reload_val;
- state->pit_reload = reload_val;
+#define KEY_MAX 128
+#define MAKE_KEY(x) snprintf(key,KEY_MAX,"PIT_CH%d_%s",i,x)
+static int pit_save(struct v3_chkpt_ctx * ctx, void * private_data) {
+ struct pit * pit_state = (struct pit *)private_data;
+ int i;
+ char key[KEY_MAX];
+ V3_CHKPT_SAVE(ctx, "PIT_COUNTER", pit_state->pit_counter,savefailout);
+ V3_CHKPT_SAVE(ctx, "PIT_RELOAD", pit_state->pit_reload,savefailout);
- init_channel(&(state->ch_0));
- init_channel(&(state->ch_1));
- init_channel(&(state->ch_2));
+ for (i=0;i<3;i++) {
+ struct channel *c;
+ uint8_t pins;
-#ifdef DEBUG_PIT
- PrintDebug("8254 PIT: CPU MHZ=%d -- pit count=", cpu_khz / 1000);
- PrintTraceLL(state->pit_counter);
- PrintDebug("\n");
-#endif
+ if (i==0) {
+ c=&(pit_state->ch_0);
+ } else if (i==1) {
+ c=&(pit_state->ch_1);
+ } else {
+ c=&(pit_state->ch_2);
+ }
+
+ MAKE_KEY("ACCESS_MODE");
+ V3_CHKPT_SAVE(ctx, key, c->access_mode, savefailout);
+ MAKE_KEY("ACCESS_STATE");
+ V3_CHKPT_SAVE(ctx, key, c->access_state, savefailout);
+ MAKE_KEY("RUN_STATE");
+ V3_CHKPT_SAVE(ctx, key, c->run_state, savefailout);
+ MAKE_KEY("OP_MODE");
+ V3_CHKPT_SAVE(ctx, key, c->op_mode, savefailout);
+ MAKE_KEY("COUNTER");
+ V3_CHKPT_SAVE(ctx, key, c->counter, savefailout);
+ MAKE_KEY("RELOAD_VALUE");
+ V3_CHKPT_SAVE(ctx, key, c->reload_value, savefailout);
+
+ MAKE_KEY("LATCH_VALUE");
+ V3_CHKPT_SAVE(ctx, key, c->latched_value, savefailout);
+
+ MAKE_KEY("LATCH_STATE");
+ V3_CHKPT_SAVE(ctx, key, c->latch_state, savefailout);
+ MAKE_KEY("READ_STATE");
+ V3_CHKPT_SAVE(ctx, key, c->read_state, savefailout);
+
+ pins = (c->output_pin) | (c->gate_input_pin << 1);
+ MAKE_KEY("PINS");
+ V3_CHKPT_SAVE(ctx, key, pins, savefailout);
+ }
+
+ V3_CHKPT_SAVE(ctx, "PIT_SPEAKER", pit_state->speaker,savefailout);
+
+ return 0;
- return 0;
+ savefailout:
+ PrintError(VM_NONE, VCORE_NONE, "Failed to save pit\n");
+ return -1;
}
-static int pit_deinit(struct vm_device * dev) {
+static int pit_load(struct v3_chkpt_ctx * ctx, void * private_data) {
+ struct pit * pit_state = (struct pit *)private_data;
+ int i;
+ char key[KEY_MAX];
- return 0;
-}
+ V3_CHKPT_LOAD(ctx, "PIT_COUNTER", pit_state->pit_counter,loadfailout);
+ V3_CHKPT_LOAD(ctx, "PIT_RELOAD", pit_state->pit_reload,loadfailout);
+
+ for (i=0;i<3;i++) {
+ struct channel *c;
+ uint8_t pins;
+
+ if (i==0) {
+ c=&(pit_state->ch_0);
+ } else if (i==1) {
+ c=&(pit_state->ch_1);
+ } else {
+ c=&(pit_state->ch_2);
+ }
+
+ MAKE_KEY("ACCESS_MODE");
+ V3_CHKPT_LOAD(ctx, key, c->access_mode, loadfailout);
+ MAKE_KEY("ACCESS_STATE");
+ V3_CHKPT_LOAD(ctx, key, c->access_state, loadfailout);
+ MAKE_KEY("RUN_STATE");
+ V3_CHKPT_LOAD(ctx, key, c->run_state, loadfailout);
+ MAKE_KEY("OP_MODE");
+ V3_CHKPT_LOAD(ctx, key, c->op_mode, loadfailout);
+ MAKE_KEY("COUNTER");
+ V3_CHKPT_LOAD(ctx, key, c->counter, loadfailout);
+ MAKE_KEY("RELOAD_VALUE");
+ V3_CHKPT_LOAD(ctx, key, c->reload_value, loadfailout);
+
+ MAKE_KEY("LATCH_VALUE");
+ V3_CHKPT_LOAD(ctx, key, c->latched_value, loadfailout);
+
+ MAKE_KEY("LATCH_STATE");
+ V3_CHKPT_LOAD(ctx, key, c->latch_state, loadfailout);
+ MAKE_KEY("READ_STATE");
+ V3_CHKPT_LOAD(ctx, key, c->read_state, loadfailout);
+
+ pins = (c->output_pin) | (c->gate_input_pin << 1);
+ MAKE_KEY("PINS");
+ V3_CHKPT_LOAD(ctx, key, pins, loadfailout);
+ }
+
+ V3_CHKPT_LOAD(ctx, "PIT_SPEAKER", pit_state->speaker,loadfailout);
+ return 0;
-static struct vm_device_ops dev_ops = {
- .init = pit_init,
- .deinit = pit_deinit,
- .reset = NULL,
- .start = NULL,
- .stop = NULL,
+ loadfailout:
+ PrintError(VM_NONE, VCORE_NONE, "Failed to load pit\n");
+ return -1;
+}
+#endif
+static struct v3_device_ops dev_ops = {
+ .free = (int (*)(void *))pit_free,
+#ifdef V3_CONFIG_CHECKPOINT
+ .save = pit_save,
+ .load = pit_load,
+#endif
};
+#include <palacios/vm_guest.h>
-struct vm_device * create_pit() {
- struct pit * pit_state = NULL;
- pit_state = (struct pit *)V3_Malloc(sizeof(struct pit));
- V3_ASSERT(pit_state != NULL);
+static int pit_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
+ struct pit * pit_state = NULL;
+ struct vm_device * dev = NULL;
+ char * dev_id = v3_cfg_val(cfg, "ID");
+ int ret = 0;
- struct vm_device * dev = create_device("PIT", &dev_ops, pit_state);
-
- return dev;
+ // PIT is only usable in non-multicore environments
+ // just hardcode the core context
+ struct guest_info * info = &(vm->cores[0]);
+
+ uint_t cpu_khz = info->time_state.guest_cpu_freq;
+ ullong_t reload_val = (ullong_t)cpu_khz * 1000;
+
+ pit_state = (struct pit *)V3_Malloc(sizeof(struct pit));
+
+ if (!pit_state) {
+ PrintError(info->vm_info, info, "Cannot allocate in init\n");
+ return -1;
+ }
+
+ pit_state->speaker = 0;
+ pit_state->vm = vm;
+
+ dev = v3_add_device(vm, dev_id, &dev_ops, pit_state);
+
+ if (dev == NULL) {
+ PrintError(info->vm_info, info, "Could not attach device %s\n", dev_id);
+ V3_Free(pit_state);
+ return -1;
+ }
+
+ ret |= v3_dev_hook_io(dev, CHANNEL0_PORT, &pit_read_channel, &pit_write_channel);
+ ret |= v3_dev_hook_io(dev, CHANNEL1_PORT, &pit_read_channel, &pit_write_channel);
+ ret |= v3_dev_hook_io(dev, CHANNEL2_PORT, &pit_read_channel, &pit_write_channel);
+ ret |= v3_dev_hook_io(dev, COMMAND_PORT, NULL, &pit_write_command);
+ ret |= v3_dev_hook_io(dev, SPEAKER_PORT, &pit_read_channel, &pit_write_channel);
+
+ if (ret != 0) {
+ PrintError(info->vm_info, info, "8254 PIT: Failed to hook IO ports\n");
+ v3_remove_device(dev);
+ return -1;
+ }
+
+#ifdef V3_CONFIG_DEBUG_PIT
+ PrintDebug(info->vm_info, info, "8254 PIT: OSC_HZ=%d, reload_val=", OSC_HZ);
+ //PrintTrace(reload_val);
+ PrintDebug(info->vm_info, info, "\n");
+#endif
+
+
+
+ pit_state->timer = v3_add_timer(info, &timer_ops, pit_state);
+
+ if (pit_state->timer == NULL) {
+ v3_remove_device(dev);
+ return -1;
+ }
+
+ // Get cpu frequency and calculate the global pit oscilattor counter/cycle
+
+ do_divll(reload_val, OSC_HZ); // this is a floor, but will be >=1 for any machine faster than 1.2 MHz
+ pit_state->pit_counter = reload_val;
+ pit_state->pit_reload = reload_val;
+
+
+ init_channel(&(pit_state->ch_0));
+ init_channel(&(pit_state->ch_1));
+ init_channel(&(pit_state->ch_2));
+
+#ifdef V3_CONFIG_DEBUG_PIT
+ PrintDebug(info->vm_info, info, "8254 PIT: CPU MHZ=%d -- pit count=", cpu_khz / 1000);
+ //PrintTraceLL(pit_state->pit_counter);
+ PrintDebug(info->vm_info, info, "\n");
+#endif
+
+ return 0;
}
+
+
+device_register("8254_PIT", pit_init);
