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qemu: initialize hot add system / acpi gpe (Marcelo Tosatti)

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ACPI GPE support, used by PCI (and CPU) hotplug.

From: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6607 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-02-11 15:21:35 +00:00
parent a7607f7e9b
commit 5e3cb5347e
3 changed files with 73 additions and 0 deletions
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68
hw/acpi.c
View File

@ -561,3 +561,71 @@ void qemu_system_powerdown(void)
}
}
#endif
#define GPE_BASE 0xafe0
struct gpe_regs {
uint16_t sts; /* status */
uint16_t en; /* enabled */
};
static struct gpe_regs gpe;
static uint32_t gpe_readb(void *opaque, uint32_t addr)
{
uint32_t val = 0;
struct gpe_regs *g = opaque;
switch (addr) {
case GPE_BASE:
val = g->sts & 0xFF;
break;
case GPE_BASE + 1:
val = (g->sts >> 8) & 0xFF;
break;
case GPE_BASE + 2:
val = g->en & 0xFF;
break;
case GPE_BASE + 3:
val = (g->en >> 8) & 0xFF;
break;
default:
break;
}
#if defined(DEBUG)
printf("gpe read %lx == %lx\n", addr, val);
#endif
return val;
}
static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val)
{
struct gpe_regs *g = opaque;
switch (addr) {
case GPE_BASE:
g->sts = (g->sts & ~0xFFFF) | (val & 0xFFFF);
break;
case GPE_BASE + 1:
g->sts = (g->sts & 0xFFFF) | (val << 8);
break;
case GPE_BASE + 2:
g->en = (g->en & ~0xFFFF) | (val & 0xFFFF);
break;
case GPE_BASE + 3:
g->en = (g->en & 0xFFFF) | (val << 8);
break;
default:
break;
}
#if defined(DEBUG)
printf("gpe write %lx <== %d\n", addr, val);
#endif
}
void qemu_system_hot_add_init(void)
{
register_ioport_write(GPE_BASE, 4, 1, gpe_writeb, &gpe);
register_ioport_read(GPE_BASE, 4, 1, gpe_readb, &gpe);
}

2
hw/pc.c
View File

@ -1010,6 +1010,8 @@ vga_bios_error:
pci_nic_init(pci_bus, nd, -1, "ne2k_pci");
}
qemu_system_hot_add_init();
if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
fprintf(stderr, "qemu: too many IDE bus\n");
exit(1);

3
sysemu.h
View File

@ -166,6 +166,9 @@ extern int nb_drives_opt;
extern int drive_add(const char *file, const char *fmt, ...);
extern int drive_init(struct drive_opt *arg, int snapshot, void *machine);
/* acpi */
void qemu_system_hot_add_init(void);
/* serial ports */
#define MAX_SERIAL_PORTS 4