X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2Fnvram.c;h=016cf10b3ba2461ee24ab45e51baeca2ae15f81b;hb=7d58ea47e874cf90da52904c250f133010c5d4bb;hp=f43cbd05856a09dd4870053f31dac9943fd41412;hpb=62786ba1c9a264dfd00aa705f62bd65b5b0e7bb0;p=palacios.git diff --git a/palacios/src/devices/nvram.c b/palacios/src/devices/nvram.c index f43cbd0..016cf10 100644 --- a/palacios/src/devices/nvram.c +++ b/palacios/src/devices/nvram.c @@ -18,15 +18,19 @@ */ -#include +#include #include #include #include #include +#include +#include +#include -#ifndef DEBUG_NVRAM + +#ifndef CONFIG_DEBUG_NVRAM #undef PrintDebug #define PrintDebug(fmt, args...) #endif @@ -91,59 +95,66 @@ typedef enum {NVRAM_READY, NVRAM_REG_POSTED} nvram_state_t; #define NVRAM_REG_BOOTSEQ_NEW_FIRST 0x3D #define NVRAM_REG_BOOTSEQ_NEW_SECOND 0x38 +#define CHECKSUM_REGION_FIRST_BYTE 0x10 +#define CHECKSUM_REGION_LAST_BYTE 0x2d + struct nvram_internal { nvram_state_t dev_state; - uchar_t thereg; - uchar_t mem_state[NVRAM_REG_MAX]; - uchar_t reg_map[NVRAM_REG_MAX / 8]; + uint8_t thereg; + uint8_t mem_state[NVRAM_REG_MAX]; + uint8_t reg_map[NVRAM_REG_MAX / 8]; struct vm_device * ide; + struct v3_vm_info * vm; + + struct v3_timer *timer; + v3_lock_t nvram_lock; - uint_t us; //microseconds - for clock update - zeroed every second - uint_t pus; //microseconds - for periodic interrupt - cleared every period + uint32_t us; //microseconds - for clock update - zeroed every second + uint32_t pus; //microseconds - for periodic interrupt - cleared every period }; struct rtc_stata { - uint_t rate: 4; // clock rate = 65536Hz / 2 rate (0110=1024 Hz) - uint_t basis: 3; // time base, 010 = 32,768 Hz - uint_t uip: 1; // 1=update in progress + uint8_t rate : 4; // clock rate = 65536Hz / 2 rate (0110=1024 Hz) + uint8_t basis : 3; // time base, 010 = 32,768 Hz + uint8_t uip : 1; // 1=update in progress } __attribute__((__packed__)) __attribute__((__aligned__ (1))) ; struct rtc_statb { - uint_t sum: 1; // 1=summer (daylight savings) - uint_t h24: 1; // 1=24h clock - uint_t dm: 1; // 1=date/time is in bcd, 0=binary - uint_t rec: 1; // 1=rectangular signal - uint_t ui: 1; // 1=update interrupt - uint_t ai: 1; // 1=alarm interrupt - uint_t pi: 1; // 1=periodic interrupt - uint_t set: 1; // 1=blocked update + uint8_t sum : 1; // 1=summer (daylight savings) + uint8_t h24 : 1; // 1=24h clock + uint8_t dm : 1; // 1=date/time is in bcd, 0=binary + uint8_t rec : 1; // 1=rectangular signal + uint8_t ui : 1; // 1=update interrupt + uint8_t ai : 1; // 1=alarm interrupt + uint8_t pi : 1; // 1=periodic interrupt + uint8_t set : 1; // 1=blocked update } __attribute__((__packed__)) __attribute__((__aligned__ (1))) ; struct rtc_statc { - uint_t res: 4; // reserved - uint_t uf: 1; // 1=source of interrupt is update - uint_t af: 1; // 1=source of interrupt is alarm interrupt - uint_t pf: 1; // 1=source of interrupt is periodic interrupt - uint_t irq: 1; // 1=interrupt requested + uint8_t res : 4; // reserved + uint8_t uf : 1; // 1=source of interrupt is update + uint8_t af : 1; // 1=source of interrupt is alarm interrupt + uint8_t pf : 1; // 1=source of interrupt is periodic interrupt + uint8_t irq : 1; // 1=interrupt requested } __attribute__((__packed__)) __attribute__((__aligned__ (1))) ; struct rtc_statd { - uint_t res: 7; // reserved - uint_t val: 1; // 1=cmos ram data is OK + uint8_t res : 7; // reserved + uint8_t val : 1; // 1=cmos ram data is OK } __attribute__((__packed__)) __attribute__((__aligned__ (1))) ; struct bcd_num { - uchar_t bot : 4; - uchar_t top : 4; -}; + uint8_t bot : 4; + uint8_t top : 4; +} __attribute__((packed));; @@ -179,13 +190,13 @@ static int get_memory(struct nvram_internal * nvram, uint8_t reg, uint8_t * val) } -static uchar_t add_to(uchar_t * left, uchar_t * right, uchar_t bcd) { - uchar_t temp; +static uint8_t add_to(uint8_t * left, uint8_t * right, uint8_t bcd) { + uint8_t temp; if (bcd) { struct bcd_num * bl = (struct bcd_num *)left; struct bcd_num * br = (struct bcd_num *)right; - uchar_t carry = 0; + uint8_t carry = 0; bl->bot += br->bot; carry = bl->bot / 0xa; @@ -209,7 +220,7 @@ static uchar_t add_to(uchar_t * left, uchar_t * right, uchar_t bcd) { } -static uchar_t days_in_month(uchar_t month, uchar_t bcd) { +static uint8_t days_in_month(uint8_t month, uint8_t bcd) { // This completely ignores Julian / Gregorian stuff right now if (bcd) { @@ -267,29 +278,29 @@ static uchar_t days_in_month(uchar_t month, uchar_t bcd) { } -static void update_time( struct vm_device * dev, uint_t period_us) { - struct nvram_internal * data = (struct nvram_internal *) (dev->private_data); - struct rtc_stata * stata = (struct rtc_stata *) &((data->mem_state[NVRAM_REG_STAT_A])); - struct rtc_statb * statb = (struct rtc_statb *) &((data->mem_state[NVRAM_REG_STAT_B])); - struct rtc_statc * statc = (struct rtc_statc *) &((data->mem_state[NVRAM_REG_STAT_C])); +static void update_time(struct nvram_internal * data, uint32_t period_us) { + struct rtc_stata * stata = (struct rtc_stata *)&((data->mem_state[NVRAM_REG_STAT_A])); + struct rtc_statb * statb = (struct rtc_statb *)&((data->mem_state[NVRAM_REG_STAT_B])); + struct rtc_statc * statc = (struct rtc_statc *)&((data->mem_state[NVRAM_REG_STAT_C])); //struct rtc_statd *statd = (struct rtc_statd *) &((data->mem_state[NVRAM_REG_STAT_D])); - uchar_t * sec = (uchar_t *) &(data->mem_state[NVRAM_REG_SEC]); - uchar_t * min = (uchar_t *) &(data->mem_state[NVRAM_REG_MIN]); - uchar_t * hour = (uchar_t *) &(data->mem_state[NVRAM_REG_HOUR]); - uchar_t * weekday = (uchar_t *) &(data->mem_state[NVRAM_REG_WEEK_DAY]); - uchar_t * monthday = (uchar_t *) &(data->mem_state[NVRAM_REG_MONTH_DAY]); - uchar_t * month = (uchar_t *) &(data->mem_state[NVRAM_REG_MONTH]); - uchar_t * year = (uchar_t *) &(data->mem_state[NVRAM_REG_YEAR]); - uchar_t * cent = (uchar_t *) &(data->mem_state[NVRAM_REG_IBM_CENTURY_BYTE]); - uchar_t * seca = (uchar_t *) &(data->mem_state[NVRAM_REG_SEC_ALARM]); - uchar_t * mina = (uchar_t *) &(data->mem_state[NVRAM_REG_MIN_ALARM]); - uchar_t * houra = (uchar_t *) &(data->mem_state[NVRAM_REG_HOUR_ALARM]); - uchar_t hour24; - - uchar_t bcd = (statb->dm == 1); - uchar_t carry = 0; - uchar_t nextday = 0; - uint_t periodic_period; + uint8_t * sec = (uint8_t *)&(data->mem_state[NVRAM_REG_SEC]); + uint8_t * min = (uint8_t *)&(data->mem_state[NVRAM_REG_MIN]); + uint8_t * hour = (uint8_t *)&(data->mem_state[NVRAM_REG_HOUR]); + uint8_t * weekday = (uint8_t *)&(data->mem_state[NVRAM_REG_WEEK_DAY]); + uint8_t * monthday = (uint8_t *)&(data->mem_state[NVRAM_REG_MONTH_DAY]); + uint8_t * month = (uint8_t *)&(data->mem_state[NVRAM_REG_MONTH]); + uint8_t * year = (uint8_t *)&(data->mem_state[NVRAM_REG_YEAR]); + uint8_t * cent = (uint8_t *)&(data->mem_state[NVRAM_REG_IBM_CENTURY_BYTE]); + uint8_t * cent_ps2 = (uint8_t *)&(data->mem_state[NVRAM_REG_IBM_PS2_CENTURY_BYTE]); + uint8_t * seca = (uint8_t *)&(data->mem_state[NVRAM_REG_SEC_ALARM]); + uint8_t * mina = (uint8_t *)&(data->mem_state[NVRAM_REG_MIN_ALARM]); + uint8_t * houra = (uint8_t *)&(data->mem_state[NVRAM_REG_HOUR_ALARM]); + uint8_t hour24; + + uint8_t bcd = (statb->dm == 1); + uint8_t carry = 0; + uint8_t nextday = 0; + uint32_t periodic_period; //PrintDebug("nvram: sizeof(struct rtc_stata)=%d\n", sizeof(struct rtc_stata)); @@ -336,7 +347,7 @@ static void update_time( struct vm_device * dev, uint_t period_us) { if (hour24 & 0x80) { hour24 &= 0x8f; - uchar_t temp = ((bcd) ? 0x12 : 12); + uint8_t temp = ((bcd) ? 0x12 : 12); add_to(&hour24, &temp, bcd); } } @@ -410,6 +421,7 @@ static void update_time( struct vm_device * dev, uint_t period_us) { *year = 0; carry = 1; add_to(cent, &carry, bcd); + *cent_ps2 = *cent; } } } @@ -449,28 +461,42 @@ static void update_time( struct vm_device * dev, uint_t period_us) { // Interrupt associated VM, if needed if (statc->irq) { PrintDebug("nvram: injecting interrupt\n"); - v3_raise_irq(dev->vm, NVRAM_RTC_IRQ); + v3_raise_irq(data->vm, NVRAM_RTC_IRQ); } } - -static int handle_timer_event(struct guest_info * info, +/* +static int handle_timer_event(struct v3_vm_info * vm, struct v3_timer_event * evt, void * priv_data) { - struct vm_device * dev = (struct vm_device *)priv_data; - if (dev) { - struct nvram_internal * data = (struct nvram_internal *) (dev->private_data); - + struct nvram_internal * data = priv_data; + + if (data) { addr_t irq_state = v3_lock_irqsave(data->nvram_lock); - update_time(dev, evt->period_us); + update_time(data, evt->period_us); v3_unlock_irqrestore(data->nvram_lock, irq_state); } return 0; } +*/ + +static void nvram_update_timer(struct guest_info *vm, + ullong_t cpu_cycles, + ullong_t cpu_freq, + void *priv_data) +{ + struct nvram_internal *nvram_state = (struct nvram_internal *)priv_data; + uint32_t period_us; + + + period_us = (uint32_t) (1000000*cpu_cycles/cpu_freq); + + update_time(nvram_state,period_us); +} static void set_memory_size(struct nvram_internal * nvram, addr_t bytes) { @@ -539,7 +565,7 @@ static void init_harddrives(struct nvram_internal * nvram) { // It looks like the BIOS only tracks the disks on the first channel at 0x12? for (i = 0; i < 2; i++) { - if (v3_ide_get_geometry(nvram->ide, 0, i, &cyls, &heads, §s) == 0) { + if (v3_ide_get_geometry(nvram->ide->private_data, 0, i, &cyls, &heads, §s) == 0) { int info_reg = info_base_reg + (i * 9); @@ -580,7 +606,7 @@ static void init_harddrives(struct nvram_internal * nvram) { int drive_num = i % 2; uint32_t tmp[3]; - if (v3_ide_get_geometry(nvram->ide, chan_num, drive_num, &tmp[0], &tmp[1], &tmp[2]) == 0) { + if (v3_ide_get_geometry(nvram->ide->private_data, chan_num, drive_num, &tmp[0], &tmp[1], &tmp[2]) == 0) { trans |= TRANSLATE_LBA << (i * 2); } } @@ -589,10 +615,24 @@ static void init_harddrives(struct nvram_internal * nvram) { } } -static int init_nvram_state(struct vm_device * dev) { - struct guest_info * info = dev->vm; - struct nvram_internal * nvram = (struct nvram_internal *)dev->private_data; - +static uint16_t compute_checksum(struct nvram_internal * nvram) { + uint16_t checksum = 0; + uint8_t reg = 0; + uint8_t val = 0; + + /* add all fields between the RTC and the checksum fields */ + for (reg = CHECKSUM_REGION_FIRST_BYTE; reg < CHECKSUM_REGION_LAST_BYTE; reg++) { + /* unset fields are considered zero so get_memory can be ignored */ + get_memory(nvram, reg, &val); + checksum += val; + } + + return checksum; +} + +static int init_nvram_state(struct v3_vm_info * vm, struct nvram_internal * nvram) { + uint16_t checksum = 0; + memset(nvram->mem_state, 0, NVRAM_REG_MAX); memset(nvram->reg_map, 0, NVRAM_REG_MAX / 8); @@ -663,15 +703,24 @@ static int init_nvram_state(struct vm_device * dev) { set_memory(nvram, NVRAM_REG_MONTH_DAY, 0x1); set_memory(nvram, NVRAM_REG_WEEK_DAY, 0x1); set_memory(nvram, NVRAM_REG_YEAR, 0x08); + set_memory(nvram, NVRAM_REG_IBM_CENTURY_BYTE, 0x20); + set_memory(nvram, NVRAM_REG_IBM_PS2_CENTURY_BYTE, 0x20); set_memory(nvram, NVRAM_REG_DIAGNOSTIC_STATUS, 0x00); nvram->us = 0; nvram->pus = 0; - set_memory_size(nvram, info->mem_size); + set_memory_size(nvram, vm->mem_size); init_harddrives(nvram); + /* compute checksum (must follow all assignments here) */ + checksum = compute_checksum(nvram); + set_memory(nvram, NVRAM_REG_CSUM_HIGH, (checksum >> 8) & 0xff); + set_memory(nvram, NVRAM_REG_CSUM_LOW, checksum & 0xff); + + + nvram->dev_state = NVRAM_READY; nvram->thereg = 0; @@ -681,35 +730,12 @@ static int init_nvram_state(struct vm_device * dev) { -static int nvram_reset_device(struct vm_device * dev) { - - return 0; -} - - - - - -static int nvram_start_device(struct vm_device * dev) { - PrintDebug("nvram: start device\n"); - return 0; -} - - -static int nvram_stop_device(struct vm_device * dev) { - PrintDebug("nvram: stop device\n"); - return 0; -} - - -static int nvram_write_reg_port(ushort_t port, - void * src, - uint_t length, - struct vm_device * dev) { +static int nvram_write_reg_port(struct guest_info * core, uint16_t port, + void * src, uint_t length, void * priv_data) { - struct nvram_internal * data = (struct nvram_internal *)dev->private_data; + struct nvram_internal * data = priv_data; memcpy(&(data->thereg), src, 1); PrintDebug("Writing To NVRAM reg: 0x%x\n", data->thereg); @@ -717,12 +743,10 @@ static int nvram_write_reg_port(ushort_t port, return 1; } -static int nvram_read_data_port(ushort_t port, - void * dst, - uint_t length, - struct vm_device * dev) { +static int nvram_read_data_port(struct guest_info * core, uint16_t port, + void * dst, uint_t length, void * priv_data) { - struct nvram_internal * data = (struct nvram_internal *)dev->private_data; + struct nvram_internal * data = priv_data; addr_t irq_state = v3_lock_irqsave(data->nvram_lock); @@ -731,7 +755,12 @@ static int nvram_read_data_port(ushort_t port, v3_unlock_irqrestore(data->nvram_lock, irq_state); - return -1; + /* allow guest to query checksummed bytes; warn but read zero rather than fail in this case */ + if ((data->thereg >= CHECKSUM_REGION_FIRST_BYTE) && (data->thereg <= CHECKSUM_REGION_LAST_BYTE)) { + return 1; + } else { + return -1; + } } PrintDebug("nvram_read_data_port(0x%x) = 0x%x\n", data->thereg, *(uint8_t *)dst); @@ -747,12 +776,10 @@ static int nvram_read_data_port(ushort_t port, } -static int nvram_write_data_port(ushort_t port, - void * src, - uint_t length, - struct vm_device * dev) { +static int nvram_write_data_port(struct guest_info * core, uint16_t port, + void * src, uint_t length, void * priv_data) { - struct nvram_internal * data = (struct nvram_internal *)dev->private_data; + struct nvram_internal * data = priv_data; addr_t irq_state = v3_lock_irqsave(data->nvram_lock); @@ -768,53 +795,83 @@ static int nvram_write_data_port(ushort_t port, -static int nvram_init_device(struct vm_device * dev) { - PrintDebug("nvram: init_device\n"); - - init_nvram_state(dev); - - // hook ports - v3_dev_hook_io(dev, NVRAM_REG_PORT, NULL, &nvram_write_reg_port); - v3_dev_hook_io(dev, NVRAM_DATA_PORT, &nvram_read_data_port, &nvram_write_data_port); - - v3_hook_host_event(dev->vm, HOST_TIMER_EVT, V3_HOST_EVENT_HANDLER(handle_timer_event), dev); - return 0; -} +static int nvram_free(struct nvram_internal * nvram_state) { + + // unregister host events + struct guest_info *info = &(nvram_state->vm->cores[0]); -static int nvram_deinit_device(struct vm_device * dev) { - v3_dev_unhook_io(dev, NVRAM_REG_PORT); - v3_dev_unhook_io(dev, NVRAM_DATA_PORT); + if (nvram_state->timer) { + v3_remove_timer(info,nvram_state->timer); + } - nvram_reset_device(dev); + V3_Free(nvram_state); return 0; } +static struct v3_timer_ops timer_ops = { + .update_timer = nvram_update_timer, +}; -static struct vm_device_ops dev_ops = { - .init = nvram_init_device, - .deinit = nvram_deinit_device, - .reset = nvram_reset_device, - .start = nvram_start_device, - .stop = nvram_stop_device, +static struct v3_device_ops dev_ops = { + .free = (int (*)(void *))nvram_free, }; -struct vm_device * v3_create_nvram(struct vm_device * ide) { + +static int nvram_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) { struct nvram_internal * nvram_state = NULL; + struct vm_device * ide = v3_find_dev(vm, v3_cfg_val(cfg, "storage")); + char * dev_id = v3_cfg_val(cfg, "ID"); + int ret = 0; + if (!ide) { + PrintError("Could not find IDE device\n"); + return -1; + } + + PrintDebug("nvram: init_device\n"); nvram_state = (struct nvram_internal *)V3_Malloc(sizeof(struct nvram_internal) + 1000); PrintDebug("nvram: internal at %p\n", (void *)nvram_state); nvram_state->ide = ide; + nvram_state->vm = vm; + + struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, nvram_state); - struct vm_device * device = v3_create_device("NVRAM", &dev_ops, nvram_state); + if (dev == NULL) { + PrintError("Could not attach device %s\n", dev_id); + V3_Free(nvram_state); + return -1; + } - return device; + init_nvram_state(vm, nvram_state); + + // hook ports + ret |= v3_dev_hook_io(dev, NVRAM_REG_PORT, NULL, &nvram_write_reg_port); + ret |= v3_dev_hook_io(dev, NVRAM_DATA_PORT, &nvram_read_data_port, &nvram_write_data_port); + + if (ret != 0) { + PrintError("Error hooking NVRAM IO ports\n"); + v3_remove_device(dev); + return -1; + } + + // v3_hook_host_event(vm, HOST_TIMER_EVT, V3_HOST_EVENT_HANDLER(handle_timer_event), nvram_state); + nvram_state->timer = v3_add_timer(&(vm->cores[0]),&timer_ops,nvram_state); + + if (nvram_state->timer == NULL ) { + v3_remove_device(dev); + return -1; + } + + return 0; } + +device_register("NVRAM", nvram_init)