mirror of https://gitee.com/openkylin/qemu.git
added IDE mult support - reduced irq latency (IDE should have good performances now)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@295 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
parent
8c9b861e74
commit
c9159e5321
108
vl.c
108
vl.c
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@ -54,6 +54,7 @@
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#define DEFAULT_NETWORK_SCRIPT "/etc/vl-ifup"
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//#define DEBUG_UNUSED_IOPORT
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//#define DEBUG_IRQ_LATENCY
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#define PHYS_RAM_BASE 0xa8000000
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#define KERNEL_LOAD_ADDR 0x00100000
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@ -598,14 +599,9 @@ static int pic_get_irq(PicState *s)
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}
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}
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void pic_set_irq(int irq, int level)
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{
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pic_set_irq1(&pics[irq >> 3], irq & 7, level);
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}
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/* can be called at any time outside cpu_exec() to raise irqs if
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necessary */
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void pic_handle_irq(void)
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/* raise irq to CPU if necessary. must be called every time the active
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irq may change */
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static void pic_update_irq(void)
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{
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int irq2, irq;
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@ -626,16 +622,36 @@ void pic_handle_irq(void)
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/* from master pic */
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pic_irq_requested = irq;
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}
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global_env->hard_interrupt_request = 1;
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cpu_x86_interrupt(global_env, CPU_INTERRUPT_HARD);
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}
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}
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#ifdef DEBUG_IRQ_LATENCY
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int64_t irq_time[16];
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int64_t cpu_get_ticks(void);
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#endif
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void pic_set_irq(int irq, int level)
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{
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#ifdef DEBUG_IRQ_LATENCY
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if (level) {
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irq_time[irq] = cpu_get_ticks();
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}
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#endif
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pic_set_irq1(&pics[irq >> 3], irq & 7, level);
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pic_update_irq();
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}
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int cpu_x86_get_pic_interrupt(CPUX86State *env)
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{
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int irq, irq2, intno;
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/* signal the pic that the irq was acked by the CPU */
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irq = pic_irq_requested;
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#ifdef DEBUG_IRQ_LATENCY
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printf("IRQ%d latency=%Ld\n", irq, cpu_get_ticks() - irq_time[irq]);
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#endif
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if (irq >= 8) {
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irq2 = irq & 7;
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pics[1].isr |= (1 << irq2);
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@ -706,6 +722,7 @@ void pic_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
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case 0:
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/* normal mode */
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s->imr = val;
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pic_update_irq();
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break;
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case 1:
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s->irq_base = val & 0xf8;
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@ -1570,8 +1587,6 @@ void ne2000_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
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s->rcnt == 0) {
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s->isr |= ENISR_RDC;
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ne2000_update_irq(s);
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/* XXX: find a better solution for irqs */
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cpu_x86_interrupt(global_env);
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}
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if (val & E8390_TRANS) {
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net_send_packet(s, s->mem + (s->tpsr << 8), s->tcnt);
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@ -1931,7 +1946,8 @@ void ne2000_init(void)
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#define WIN_SET_MAX 0xF9
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#define DISABLE_SEAGATE 0xFB
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#define MAX_MULT_SECTORS 16
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/* set to 1 set disable mult support */
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#define MAX_MULT_SECTORS 8
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#define MAX_DISKS 2
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@ -1948,7 +1964,7 @@ typedef struct IDEState {
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/* ide regs */
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uint8_t feature;
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uint8_t error;
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uint8_t nsector;
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uint16_t nsector; /* 0 is 256 to ease computations */
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uint8_t sector;
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uint8_t lcyl;
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uint8_t hcyl;
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@ -1959,6 +1975,7 @@ typedef struct IDEState {
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/* depends on bit 4 in select, only meaningful for drive 0 */
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struct IDEState *cur_drive;
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BlockDriverState *bs;
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int req_nb_sectors; /* number of sectors per interrupt */
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EndTransferFunc *end_transfer_func;
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uint8_t *data_ptr;
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uint8_t *data_end;
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@ -1998,7 +2015,9 @@ static void ide_identify(IDEState *s)
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stw(p + 21, 512); /* cache size in sectors */
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stw(p + 22, 4); /* ecc bytes */
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padstr((uint8_t *)(p + 27), "QEMU HARDDISK", 40);
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// stw(p + 47, MAX_MULT_SECTORS);
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#if MAX_MULT_SECTORS > 1
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stw(p + 47, MAX_MULT_SECTORS);
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#endif
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stw(p + 48, 1); /* dword I/O */
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stw(p + 49, 1 << 9); /* LBA supported, no DMA */
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stw(p + 51, 0x200); /* PIO transfer cycle */
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@ -2032,7 +2051,6 @@ static inline void ide_set_irq(IDEState *s)
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{
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if (!(ide_state[0].cmd & IDE_CMD_DISABLE_IRQ)) {
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pic_set_irq(s->irq, 1);
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cpu_x86_interrupt(global_env);
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}
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}
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@ -2090,51 +2108,60 @@ static void ide_set_sector(IDEState *s, int64_t sector_num)
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static void ide_sector_read(IDEState *s)
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{
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int64_t sector_num;
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int ret;
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int ret, n;
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s->status = READY_STAT | SEEK_STAT;
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sector_num = ide_get_sector(s);
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s->nsector--;
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if (s->nsector == 0xff) {
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n = s->nsector;
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if (n == 0) {
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/* no more sector to read from disk */
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ide_transfer_stop(s);
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} else {
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#if defined(DEBUG_IDE)
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printf("read sector=%Ld\n", sector_num);
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#endif
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ret = bdrv_read(s->bs, sector_num, s->io_buffer, 1);
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ide_transfer_start(s, 512, ide_sector_read);
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if (n > s->req_nb_sectors)
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n = s->req_nb_sectors;
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ret = bdrv_read(s->bs, sector_num, s->io_buffer, n);
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ide_transfer_start(s, 512 * n, ide_sector_read);
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ide_set_irq(s);
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ide_set_sector(s, sector_num + n);
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s->nsector -= n;
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}
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ide_set_sector(s, sector_num + 1);
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}
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static void ide_sector_write(IDEState *s)
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{
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int64_t sector_num;
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int ret;
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int ret, n, n1;
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s->status = READY_STAT | SEEK_STAT;
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sector_num = ide_get_sector(s);
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#if defined(DEBUG_IDE)
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printf("write sector=%Ld\n", sector_num);
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#endif
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ret = bdrv_write(s->bs, sector_num, s->io_buffer, 1);
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s->nsector--;
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n = s->nsector;
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if (n > s->req_nb_sectors)
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n = s->req_nb_sectors;
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ret = bdrv_write(s->bs, sector_num, s->io_buffer, n);
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s->nsector -= n;
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if (s->nsector == 0) {
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/* no more sector to write */
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ide_transfer_stop(s);
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} else {
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ide_transfer_start(s, 512, ide_sector_write);
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n1 = s->nsector;
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if (n1 > s->req_nb_sectors)
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n1 = s->req_nb_sectors;
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ide_transfer_start(s, 512 * n1, ide_sector_write);
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}
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ide_set_sector(s, sector_num + 1);
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ide_set_sector(s, sector_num + n);
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ide_set_irq(s);
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}
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void ide_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
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{
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IDEState *s = ide_state[0].cur_drive;
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int unit;
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int unit, n;
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addr &= 7;
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#ifdef DEBUG_IDE
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@ -2147,6 +2174,8 @@ void ide_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
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s->feature = val;
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break;
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case 2:
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if (val == 0)
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val = 256;
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s->nsector = val;
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break;
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case 3:
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@ -2201,14 +2230,33 @@ void ide_ioport_write(CPUX86State *env, uint32_t addr, uint32_t val)
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break;
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case WIN_READ:
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case WIN_READ_ONCE:
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s->req_nb_sectors = 1;
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ide_sector_read(s);
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break;
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case WIN_WRITE:
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case WIN_WRITE_ONCE:
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s->status = SEEK_STAT;
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s->req_nb_sectors = 1;
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ide_transfer_start(s, 512, ide_sector_write);
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break;
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case WIN_MULTREAD:
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if (!s->mult_sectors)
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goto abort_cmd;
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s->req_nb_sectors = s->mult_sectors;
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ide_sector_read(s);
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break;
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case WIN_MULTWRITE:
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if (!s->mult_sectors)
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goto abort_cmd;
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s->status = SEEK_STAT;
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s->req_nb_sectors = s->mult_sectors;
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n = s->nsector;
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if (n > s->req_nb_sectors)
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n = s->req_nb_sectors;
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ide_transfer_start(s, 512 * n, ide_sector_write);
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break;
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default:
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abort_cmd:
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ide_abort_command(s);
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ide_set_irq(s);
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break;
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@ -2230,7 +2278,7 @@ uint32_t ide_ioport_read(CPUX86State *env, uint32_t addr)
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ret = s->error;
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break;
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case 2:
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ret = s->nsector;
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ret = s->nsector & 0xff;
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break;
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case 3:
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ret = s->sector;
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@ -2400,7 +2448,7 @@ static void host_alarm_handler(int host_signum, siginfo_t *info,
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timer_irq_count = 2;
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timer_irq_count--;
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/* just exit from the cpu to have a chance to handle timers */
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cpu_x86_interrupt(global_env);
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cpu_x86_interrupt(global_env, CPU_INTERRUPT_EXIT);
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timer_irq_pending = 1;
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}
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}
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@ -2487,8 +2535,6 @@ void main_loop(void *opaque)
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pic_set_irq(0, 0);
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timer_irq_pending = 0;
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}
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pic_handle_irq();
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}
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}
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