X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2F8254.c;h=8e7dede87825dfa19a979058deee39f48416af20;hb=596d3c2aa2f0a5360baf1c921e4543f014809b78;hp=fd9ab38523145a019ae20c6975133c48b64bbd18;hpb=4bc3ee757b44d3e466fd89e348106c47fa5511ee;p=palacios.git diff --git a/palacios/src/devices/8254.c b/palacios/src/devices/8254.c index fd9ab38..8e7dede 100644 --- a/palacios/src/devices/8254.c +++ b/palacios/src/devices/8254.c @@ -17,15 +17,16 @@ * redistribute, and modify it as specified in the file "V3VEE_LICENSE". */ -#include + #include +#include #include #include #include +#include - -#ifndef DEBUG_PIT +#ifndef CONFIG_DEBUG_PIT #undef PrintDebug #define PrintDebug(fmt, args...) #endif @@ -41,9 +42,11 @@ #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 @@ -87,6 +90,7 @@ struct pit { struct channel ch_0; struct channel ch_1; struct channel ch_2; + uint8_t speaker; }; @@ -154,10 +158,8 @@ 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 +170,12 @@ 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; @@ -206,9 +214,16 @@ static int handle_crystal_tics(struct vm_device * dev, struct channel * ch, uint break; case SW_STROBE: - 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"); return -1; break; default: @@ -219,8 +234,9 @@ 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) { +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; // ullong_t tmp_ctr = state->pit_counter; @@ -284,11 +300,11 @@ static void pit_update_time(ullong_t cpu_cycles, ullong_t cpu_freq, void * priva 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); + 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(dev, &(state->ch_2), oscillations); } @@ -297,8 +313,6 @@ 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) { @@ -337,6 +351,7 @@ static int handle_channel_write(struct channel * ch, char val) { PrintDebug("8254 PIT: Channel Run State=%d\n", ch->run_state); break; default: + PrintError("Invalid Access state\n"); return -1; } @@ -354,7 +369,11 @@ 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; break; } @@ -389,9 +408,20 @@ 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; @@ -430,7 +460,11 @@ 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; } @@ -441,7 +475,7 @@ 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) { +static int pit_read_channel(struct guest_info * core, ushort_t port, void * dst, uint_t length, struct vm_device * dev) { struct pit * state = (struct pit *)dev->private_data; char * val = (char *)dst; @@ -455,16 +489,25 @@ static int pit_read_channel(ushort_t port, void * dst, uint_t length, struct vm_ switch (port) { case CHANNEL0_PORT: if (handle_channel_read(&(state->ch_0), val) == -1) { + PrintError("CHANNEL0 read error\n"); return -1; } break; case CHANNEL1_PORT: if (handle_channel_read(&(state->ch_1), val) == -1) { + PrintError("CHANNEL1 read error\n"); return -1; } break; case CHANNEL2_PORT: if (handle_channel_read(&(state->ch_2), val) == -1) { + PrintError("CHANNEL2 read error\n"); + 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; @@ -478,7 +521,7 @@ 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) { +static int pit_write_channel(struct guest_info * core, ushort_t port, void * src, uint_t length, struct vm_device * dev) { struct pit * state = (struct pit *)dev->private_data; char val = *(char *)src; @@ -493,16 +536,25 @@ static int pit_write_channel(ushort_t port, void * src, uint_t length, struct vm switch (port) { case CHANNEL0_PORT: if (handle_channel_write(&(state->ch_0), val) == -1) { + PrintError("CHANNEL0 write error\n"); return -1; } break; case CHANNEL1_PORT: if (handle_channel_write(&(state->ch_1), val) == -1) { + PrintError("CHANNEL1 write error\n"); return -1; } break; case CHANNEL2_PORT: if (handle_channel_write(&(state->ch_2), val) == -1) { + PrintError("CHANNEL2 write error\n"); + 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; @@ -517,7 +569,7 @@ 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) { +static int pit_write_command(struct guest_info * core, 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; @@ -531,21 +583,25 @@ static int pit_write_command(ushort_t port, void * src, uint_t length, struct vm switch (cmd->channel) { case 0: if (handle_channel_cmd(&(state->ch_0), *cmd) == -1) { + PrintError("CHANNEL0 command error\n"); return -1; } break; case 1: if (handle_channel_cmd(&(state->ch_1), *cmd) == -1) { + PrintError("CHANNEL1 command error\n"); return -1; } break; case 2: if (handle_channel_cmd(&(state->ch_2), *cmd) == -1) { + PrintError("CHANNEL2 command error\n"); return -1; } break; case 3: // Read Back command + PrintError("Read back command not implemented\n"); return -1; break; default: @@ -560,7 +616,7 @@ 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, + .update_timer = pit_update_timer, }; @@ -583,67 +639,82 @@ static void init_channel(struct channel * ch) { } -static int pit_init(struct vm_device * dev) { - struct pit * state = (struct pit *)dev->private_data; + + +static int pit_free(struct vm_device * dev) { + + return 0; +} + + +static struct v3_device_ops dev_ops = { + .free = pit_free, + .reset = NULL, + .start = NULL, + .stop = NULL, + +}; + +#include + +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"); + + // 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(); 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; + + dev = v3_allocate_device(dev_id, &dev_ops, pit_state); + + if (v3_attach_device(vm, dev) == -1) { + PrintError("Could not attach device %s\n", dev_id); + return -1; + } + 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); + v3_dev_hook_io(dev, SPEAKER_PORT, &pit_read_channel, &pit_write_channel); -#ifdef DEBUG_PIT +#ifdef CONFIG_DEBUG_PIT PrintDebug("8254 PIT: OSC_HZ=%d, reload_val=", OSC_HZ); - PrintTraceLL(reload_val); + //PrintTrace(reload_val); PrintDebug("\n"); #endif - v3_add_timer(dev->vm, &timer_ops, dev); + + v3_add_timer(info, &timer_ops, dev); // Get cpu frequency and calculate the global pit oscilattor counter/cycle do_divll(reload_val, OSC_HZ); - state->pit_counter = reload_val; - state->pit_reload = reload_val; + pit_state->pit_counter = reload_val; + pit_state->pit_reload = reload_val; - init_channel(&(state->ch_0)); - init_channel(&(state->ch_1)); - init_channel(&(state->ch_2)); + init_channel(&(pit_state->ch_0)); + init_channel(&(pit_state->ch_1)); + init_channel(&(pit_state->ch_2)); -#ifdef DEBUG_PIT +#ifdef CONFIG_DEBUG_PIT PrintDebug("8254 PIT: CPU MHZ=%d -- pit count=", cpu_khz / 1000); - PrintTraceLL(state->pit_counter); + //PrintTraceLL(pit_state->pit_counter); PrintDebug("\n"); #endif return 0; } -static int pit_deinit(struct vm_device * dev) { - - return 0; -} - - -static struct vm_device_ops dev_ops = { - .init = pit_init, - .deinit = pit_deinit, - .reset = NULL, - .start = NULL, - .stop = NULL, - -}; - - -struct vm_device * v3_create_pit() { - struct pit * pit_state = NULL; - pit_state = (struct pit *)V3_Malloc(sizeof(struct pit)); - V3_ASSERT(pit_state != NULL); - struct vm_device * dev = v3_create_device("PIT", &dev_ops, pit_state); - - return dev; -} +device_register("8254_PIT", pit_init);