X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2F8254.c;h=b945d2b2ffceefc887d60812c6400edb0b276213;hb=9cf8f2ddcb1d8c1d14adb6e5ac7084a5bb91d07a;hp=90f860a91215754e3d23323f7f00e84278120c92;hpb=c2dcf1a09b4843add1fc28380707bc8c3ed5204b;p=palacios.git diff --git a/palacios/src/devices/8254.c b/palacios/src/devices/8254.c index 90f860a..b945d2b 100644 --- a/palacios/src/devices/8254.c +++ b/palacios/src/devices/8254.c @@ -17,15 +17,17 @@ * redistribute, and modify it as specified in the file "V3VEE_LICENSE". */ -#include + #include +#include #include #include #include +#include +#include - -#ifndef DEBUG_PIT +#ifndef CONFIG_DEBUG_PIT #undef PrintDebug #define PrintDebug(fmt, args...) #endif @@ -41,9 +43,11 @@ #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 @@ -83,10 +87,14 @@ struct pit { 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; + uint8_t speaker; }; @@ -121,7 +129,7 @@ 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; @@ -154,10 +162,8 @@ static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint } else { ushort_t reload_val = ch->reload_value; - // TODO: Check this.... - // Is this correct??? - if (reload_val == 0) { - reload_val = 1; + if (ch->op_mode == SW_STROBE) { + reload_val = 0xffff; } oscillations -= ch->counter; @@ -168,6 +174,12 @@ static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint reload_val -= reload_val % 2; } + // TODO: Check this.... + // Is this correct??? + if (reload_val == 0) { + reload_val = 1; + } + channel_cycles += oscillations / reload_val; oscillations = oscillations % reload_val; @@ -206,8 +218,13 @@ static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint break; case SW_STROBE: - PrintError("Software strobe not implemented\n"); - return -1; + + if (channel_cycles > 0) { + if (ch->output_pin == 1) { + ch->output_pin = 0; + output_changed = 1; + } + } break; case HW_STROBE: PrintError("Hardware strobe not implemented\n"); @@ -221,10 +238,10 @@ static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint } +#include -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; +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; @@ -282,15 +299,18 @@ static void pit_update_time(ullong_t cpu_cycles, ullong_t cpu_freq, void * priva // 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) { + 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\n"); - v3_raise_irq(dev->vm, 0); + // 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); + //handle_crystal_tics(state, &(state->ch_1), oscillations); + handle_crystal_tics(state, &(state->ch_2), oscillations); } @@ -299,8 +319,6 @@ static void pit_update_time(ullong_t cpu_cycles, ullong_t cpu_freq, void * priva return; } - - /* This should call out to handle_SQR_WAVE_write, etc... */ static int handle_channel_write(struct channel * ch, char val) { @@ -357,6 +375,9 @@ static int handle_channel_write(struct channel * ch, char val) { case SQR_WAVE: ch->output_pin = 1; break; + case SW_STROBE: + ch->output_pin = 1; + break; default: PrintError("Invalid OP_MODE: %d\n", ch->op_mode); return -1; @@ -393,9 +414,20 @@ static int handle_channel_read(struct channel * ch, char * val) { } +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; @@ -434,6 +466,9 @@ static int handle_channel_cmd(struct channel * ch, struct pit_cmd_word cmd) { case SQR_WAVE: ch->output_pin = 1; break; + case SW_STROBE: + ch->output_pin = 1; + break; default: PrintError("Invalid OP_MODE: %d\n", cmd.op_mode); return -1; @@ -446,8 +481,8 @@ static int handle_channel_cmd(struct channel * ch, struct pit_cmd_word cmd) { -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; +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; if (length != 1) { @@ -476,6 +511,12 @@ static int pit_read_channel(ushort_t port, void * dst, uint_t length, struct vm_ return -1; } break; + case SPEAKER_PORT: + if (handle_speaker_read(&state->speaker, &(state->ch_2), val) == -1) { + PrintError("SPEAKER read error\n"); + return -1; + } + break; default: PrintError("8254 PIT: Read from invalid port (%d)\n", port); return -1; @@ -486,8 +527,8 @@ static int pit_read_channel(ushort_t port, void * dst, uint_t length, struct vm_ -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; +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) { @@ -517,6 +558,12 @@ static int pit_write_channel(ushort_t port, void * src, uint_t length, struct vm return -1; } break; + case SPEAKER_PORT: + if (handle_speaker_write(&state->speaker, &(state->ch_2), val) == -1) { + PrintError("SPEAKER write error\n"); + return -1; + } + break; default: PrintError("8254 PIT: Write to invalid port (%d)\n", port); return -1; @@ -528,8 +575,8 @@ static int pit_write_channel(ushort_t port, void * src, uint_t length, struct vm -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; +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; PrintDebug("8254 PIT: Write to PIT Command port\n"); @@ -574,8 +621,8 @@ static int pit_write_command(ushort_t port, void * src, uint_t length, struct vm -static struct vm_timer_ops timer_ops = { - .update_time = pit_update_time, +static struct v3_timer_ops timer_ops = { + .update_timer = pit_update_timer, }; @@ -598,67 +645,158 @@ static void init_channel(struct channel * ch) { } -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; - v3_dev_hook_io(dev, CHANNEL0_PORT, &pit_read_channel, &pit_write_channel); - v3_dev_hook_io(dev, CHANNEL1_PORT, &pit_read_channel, &pit_write_channel); - v3_dev_hook_io(dev, CHANNEL2_PORT, &pit_read_channel, &pit_write_channel); - v3_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]); - v3_add_timer(dev->vm, &timer_ops, dev); - // Get cpu frequency and calculate the global pit oscilattor counter/cycle + if (state->timer) { + v3_remove_timer(info, state->timer); + } + + V3_Free(state); + return 0; +} - do_divll(reload_val, OSC_HZ); - state->pit_counter = reload_val; - state->pit_reload = reload_val; +#ifdef CONFIG_KEYED_STREAMS +static int pit_checkpoint(struct vm_device *dev, v3_keyed_stream_t stream) +{ + struct pit *p = (struct pit *) (dev->private_data); + v3_keyed_stream_key_t ks; + ks = v3_keyed_stream_open_key(stream,dev->name); - init_channel(&(state->ch_0)); - init_channel(&(state->ch_1)); - init_channel(&(state->ch_2)); + if (!ks) { + return -1; + } -#ifdef DEBUG_PIT - PrintDebug("8254 PIT: CPU MHZ=%d -- pit count=", cpu_khz / 1000); - PrintTraceLL(state->pit_counter); - PrintDebug("\n"); -#endif + STD_SAVE(stream,ks,p->pit_counter); + STD_SAVE(stream,ks,p->pit_reload); + STD_SAVE(stream,ks,p->ch_0); + STD_SAVE(stream,ks,p->ch_1); + STD_SAVE(stream,ks,p->ch_2); + STD_SAVE(stream,ks,p->speaker); + v3_keyed_stream_close_key(stream,ks); + return 0; + + } -static int pit_deinit(struct vm_device * dev) { +static int pit_restore(struct vm_device *dev, v3_keyed_stream_t stream) +{ + struct pit *p = (struct pit *) (dev->private_data); + + v3_keyed_stream_key_t ks; + + ks = v3_keyed_stream_open_key(stream,dev->name); + if (!ks) { + return -1; + } + + STD_LOAD(stream,ks,p->pit_counter); + STD_LOAD(stream,ks,p->pit_reload); + STD_LOAD(stream,ks,p->ch_0); + STD_LOAD(stream,ks,p->ch_1); + STD_LOAD(stream,ks,p->ch_2); + STD_LOAD(stream,ks,p->speaker); + + v3_keyed_stream_close_key(stream,ks); + return 0; -} -static struct vm_device_ops dev_ops = { - .init = pit_init, - .deinit = pit_deinit, - .reset = NULL, - .start = NULL, - .stop = NULL, +} +#endif +static struct v3_device_ops dev_ops = { + .free = (int (*)(void *))pit_free, +#ifdef CONFIG_KEYED_STREAMS + .checkpoint = pit_checkpoint, + .restore = pit_restore, +#endif }; +#include -struct vm_device * v3_create_pit() { +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 = 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; - struct vm_device * dev = v3_create_device("PIT", &dev_ops, pit_state); - - return dev; + dev = v3_add_device(vm, dev_id, &dev_ops, pit_state); + + if (dev == NULL) { + PrintError("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("8254 PIT: Failed to hook IO ports\n"); + v3_remove_device(dev); + return -1; + } + +#ifdef CONFIG_DEBUG_PIT + PrintDebug("8254 PIT: OSC_HZ=%d, reload_val=", OSC_HZ); + //PrintTrace(reload_val); + PrintDebug("\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); + 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 CONFIG_DEBUG_PIT + PrintDebug("8254 PIT: CPU MHZ=%d -- pit count=", cpu_khz / 1000); + //PrintTraceLL(pit_state->pit_counter); + PrintDebug("\n"); +#endif + + return 0; } + + +device_register("8254_PIT", pit_init);