X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2F8254.c;h=1a44399569fdd8c7dbcc84939a5661b83ecc1663;hb=64cc3bfb45f88a1880331093e87035a38c8f2bdb;hp=31375d327fcff027f218f72b7f446416da380454;hpb=b4aaeaa7233244ad9d607a0077dbbce719833fe0;p=palacios.git diff --git a/palacios/src/devices/8254.c b/palacios/src/devices/8254.c index 31375d3..1a44399 100644 --- a/palacios/src/devices/8254.c +++ b/palacios/src/devices/8254.c @@ -27,7 +27,7 @@ #include -#ifndef CONFIG_DEBUG_PIT +#ifndef V3_CONFIG_DEBUG_PIT #undef PrintDebug #define PrintDebug(fmt, args...) #endif @@ -54,8 +54,8 @@ */ 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 { @@ -89,6 +89,8 @@ struct pit { struct v3_timer * timer; + struct v3_vm_info * vm; + struct channel ch_0; struct channel ch_1; struct channel ch_2; @@ -127,11 +129,12 @@ struct pit_rdb_status_word { * 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) { +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); + // PrintDebug("8254 PIT (channel %d): %d crystal tics\n", + // ch - pit->ch0, oscillations); if (ch->run_state == PENDING) { oscillations--; ch->counter = ch->reload_value; @@ -156,11 +159,13 @@ static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint if (ch->counter > oscillations) { ch->counter -= oscillations; + //PrintDebug("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; - if (ch->op_mode == SW_STROBE) { + if ((ch->op_mode == SW_STROBE) || (ch->op_mode == IRQ_ON_TERM_CNT)) { reload_val = 0xffff; } @@ -182,23 +187,33 @@ static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint oscillations = oscillations % reload_val; ch->counter = reload_val - oscillations; + // PrintDebug("8254 PIT: Counter reset to %u.\n", + // (unsigned int)ch->counter); + } - // PrintDebug("8254 PIT: Channel Cycles: %d\n", channel_cycles); + //PrintDebug("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) && (ch->output_pin == 0)) { - ch->output_pin = 1; - output_changed = 1; + if (channel_cycles > 0) { + if (ch->output_pin == 0) { + ch->output_pin = 1; + output_changed = 1; + } else { + // PrintDebug("8254: Output not changed in TERM_CNT mode.\n"); + } } break; case ONE_SHOT: - if ((channel_cycles > 0) && (ch->output_pin == 0)) { - ch->output_pin = 1; - output_changed = 1; + if (channel_cycles > 0) { + if ((ch->output_pin == 0)) { + ch->output_pin = 1; + output_changed = 1; + } else { + // PrintDebug("8254: Output not changed in ONE_SHOT mode.\n"); + } } break; case RATE_GEN: @@ -214,6 +229,7 @@ static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint output_changed = 1; } + break; case SW_STROBE: @@ -239,8 +255,7 @@ static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint #include static void pit_update_timer(struct guest_info * info, 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; + struct pit * state = (struct pit *)private_data; // ullong_t tmp_ctr = state->pit_counter; ullong_t tmp_cycles; uint_t oscillations = 0; @@ -298,19 +313,20 @@ static void pit_update_timer(struct guest_info * info, ullong_t cpu_cycles, ullo // update counter with remainder (mod reload) state->pit_counter = state->pit_reload - cpu_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(info->vm_info, 0); - } - - //handle_crystal_tics(dev, &(state->ch_1), oscillations); - handle_crystal_tics(dev, &(state->ch_2), oscillations); - } - + if (oscillations) { + // PrintDebug("8254 PIT: Handling %d crystal tics\n", oscillations); + if (handle_crystal_tics(state, &(state->ch_0), oscillations) == 1) { + // raise interrupt + PrintDebug("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; } @@ -426,11 +442,21 @@ static int handle_speaker_write(uint8_t *speaker, struct channel * ch, char val) } 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("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("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: @@ -478,8 +504,7 @@ static int handle_channel_cmd(struct channel * ch, struct pit_cmd_word cmd) { static int pit_read_channel(struct guest_info * core, ushort_t port, void * dst, uint_t length, void * priv_data) { - struct vm_device * dev = (struct vm_device *)priv_data; - struct pit * state = (struct pit *)dev->private_data; + struct pit * state = (struct pit *)priv_data; char * val = (char *)dst; if (length != 1) { @@ -525,8 +550,7 @@ static int pit_read_channel(struct guest_info * core, ushort_t port, void * dst, static int pit_write_channel(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) { - struct vm_device * dev = (struct vm_device *)priv_data; - struct pit * state = (struct pit *)dev->private_data; + struct pit * state = (struct pit *)priv_data; char val = *(char *)src; if (length != 1) { @@ -574,8 +598,7 @@ static int pit_write_channel(struct guest_info * core, ushort_t port, void * src static int pit_write_command(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) { - struct vm_device * dev = (struct vm_device *)priv_data; - struct pit * state = (struct pit *)dev->private_data; + struct pit * state = (struct pit *)priv_data; struct pit_cmd_word * cmd = (struct pit_cmd_word *)src; PrintDebug("8254 PIT: Write to PIT Command port\n"); @@ -646,32 +669,53 @@ static void init_channel(struct channel * ch) { -static int pit_free(struct vm_device * dev) { - struct pit * state = (struct pit *)dev->private_data; - struct guest_info * info = &(dev->vm->cores[0]); +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_unhook_io_port(dev->vm, CHANNEL0_PORT); - v3_unhook_io_port(dev->vm, CHANNEL1_PORT); - v3_unhook_io_port(dev->vm, CHANNEL2_PORT); - v3_unhook_io_port(dev->vm, COMMAND_PORT); - v3_unhook_io_port(dev->vm, SPEAKER_PORT); +#ifdef V3_CONFIG_CHECKPOINT +static int pit_save(struct v3_chkpt_ctx * ctx, void * private_data) { + struct pit * pit_state = (struct pit *)private_data; + + V3_CHKPT_STD_SAVE(ctx, pit_state->pit_counter); + V3_CHKPT_STD_SAVE(ctx, pit_state->pit_reload); + V3_CHKPT_STD_SAVE(ctx, pit_state->ch_0); + V3_CHKPT_STD_SAVE(ctx, pit_state->ch_1); + V3_CHKPT_STD_SAVE(ctx, pit_state->ch_2); + V3_CHKPT_STD_SAVE(ctx, pit_state->speaker); - V3_Free(state); return 0; } +static int pit_load(struct v3_chkpt_ctx * ctx, void * private_data) { + struct pit * pit_state = (struct pit *)private_data; -static struct v3_device_ops dev_ops = { - .free = pit_free, - .reset = NULL, - .start = NULL, - .stop = NULL, + V3_CHKPT_STD_LOAD(ctx, pit_state->pit_counter); + V3_CHKPT_STD_LOAD(ctx, pit_state->pit_reload); + V3_CHKPT_STD_LOAD(ctx, pit_state->ch_0); + V3_CHKPT_STD_LOAD(ctx, pit_state->ch_1); + V3_CHKPT_STD_LOAD(ctx, pit_state->ch_2); + V3_CHKPT_STD_LOAD(ctx, pit_state->speaker); + + return 0; +} +#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 @@ -680,32 +724,42 @@ 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; + // PIT is only usable in non-multicore environments // just hardcode the core context struct guest_info * info = &(vm->cores[0]); - uint_t cpu_khz = V3_CPU_KHZ(); + 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)); + V3_ASSERT(pit_state != NULL); pit_state->speaker = 0; + pit_state->vm = vm; - dev = v3_allocate_device(dev_id, &dev_ops, pit_state); + dev = v3_add_device(vm, dev_id, &dev_ops, pit_state); - if (v3_attach_device(vm, dev) == -1) { + if (dev == NULL) { PrintError("Could not attach device %s\n", dev_id); + V3_Free(pit_state); return -1; } - v3_hook_io_port(vm, CHANNEL0_PORT, &pit_read_channel, &pit_write_channel, dev); - v3_hook_io_port(vm, CHANNEL1_PORT, &pit_read_channel, &pit_write_channel, dev); - v3_hook_io_port(vm, CHANNEL2_PORT, &pit_read_channel, &pit_write_channel, dev); - v3_hook_io_port(vm, COMMAND_PORT, NULL, &pit_write_command, dev); - v3_hook_io_port(vm, SPEAKER_PORT, &pit_read_channel, &pit_write_channel, dev); + 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); -#ifdef CONFIG_DEBUG_PIT + if (ret != 0) { + PrintError("8254 PIT: Failed to hook IO ports\n"); + v3_remove_device(dev); + return -1; + } + +#ifdef V3_CONFIG_DEBUG_PIT PrintDebug("8254 PIT: OSC_HZ=%d, reload_val=", OSC_HZ); //PrintTrace(reload_val); PrintDebug("\n"); @@ -713,10 +767,10 @@ static int pit_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) { - pit_state->timer = v3_add_timer(info, &timer_ops, dev); + pit_state->timer = v3_add_timer(info, &timer_ops, pit_state); if (pit_state->timer == NULL) { - v3_detach_device(dev); + v3_remove_device(dev); return -1; } @@ -727,12 +781,11 @@ static int pit_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) { 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 CONFIG_DEBUG_PIT +#ifdef V3_CONFIG_DEBUG_PIT PrintDebug("8254 PIT: CPU MHZ=%d -- pit count=", cpu_khz / 1000); //PrintTraceLL(pit_state->pit_counter); PrintDebug("\n");