gwj / at91sam9263 · Commits

Commit 0bacd1300dbcd7f56bdbf1ca73438b6a68c31b8f

Authored by aliguori
1 parent 6f484e73

Handle suspend in qemu (Gleb Natapov) 

Reset a PC and tell BIOS that resume from ram is required on the next boot.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6080 c046a42c-6fe2-441c-8c8c-71466251a162
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Showing 3 changed files with 32 additions and 0 deletions
hw/acpi.c
  View file @0bacd13
... ... @@ -53,6 +53,8 @@ typedef struct PIIX4PMState {
53 53 qemu_irq irq;
54 54 } PIIX4PMState;
55 55  
  56 +#define RSM_STS (1 << 15)
  57 +#define PWRBTN_STS (1 << 8)
56 58 #define RTC_EN (1 << 10)
57 59 #define PWRBTN_EN (1 << 8)
58 60 #define GBL_EN (1 << 5)
... ... @@ -151,6 +153,14 @@ static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
151 153 case 0: /* soft power off */
152 154 qemu_system_shutdown_request();
153 155 break;
  156 + case 1:
  157 + /* RSM_STS should be set on resume. Pretend that resume
  158 + was caused by power button */
  159 + s->pmsts |= (RSM_STS | PWRBTN_STS);
  160 + qemu_system_reset_request();
  161 +#if defined(TARGET_I386)
  162 + cmos_set_s3_resume();
  163 +#endif
154 164 default:
155 165 break;
156 166 }
... ... @@ -471,6 +481,17 @@ static int pm_load(QEMUFile* f,void* opaque,int version_id)
471 481 return 0;
472 482 }
473 483  
  484 +static void piix4_reset(void *opaque)
  485 +{
  486 + PIIX4PMState *s = opaque;
  487 + uint8_t *pci_conf = s->dev.config;
  488 +
  489 + pci_conf[0x58] = 0;
  490 + pci_conf[0x59] = 0;
  491 + pci_conf[0x5a] = 0;
  492 + pci_conf[0x5b] = 0;
  493 +}
  494 +
474 495 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
475 496 qemu_irq sci_irq)
476 497 {
... ... @@ -527,6 +548,8 @@ i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
527 548  
528 549 s->smbus = i2c_init_bus();
529 550 s->irq = sci_irq;
  551 + qemu_register_reset(piix4_reset, s);
  552 +
530 553 return s->smbus;
531 554 }
532 555  
... ...
... ... @@ -1135,6 +1135,14 @@ static void pc_init_isa(ram_addr_t ram_size, int vga_ram_size,
1135 1135 initrd_filename, 0, cpu_model);
1136 1136 }
1137 1137  
  1138 +/* set CMOS shutdown status register (index 0xF) as S3_resume(0xFE)
  1139 + BIOS will read it and start S3 resume at POST Entry */
  1140 +void cmos_set_s3_resume(void)
  1141 +{
  1142 + if (rtc_state)
  1143 + rtc_set_memory(rtc_state, 0xF, 0xFE);
  1144 +}
  1145 +
1138 1146 QEMUMachine pc_machine = {
1139 1147 .name = "pc",
1140 1148 .desc = "Standard PC",
... ...
... ... @@ -82,6 +82,7 @@ RTCState *rtc_init(int base, qemu_irq irq);
82 82 RTCState *rtc_mm_init(target_phys_addr_t base, int it_shift, qemu_irq irq);
83 83 void rtc_set_memory(RTCState *s, int addr, int val);
84 84 void rtc_set_date(RTCState *s, const struct tm *tm);
  85 +void cmos_set_s3_resume(void);
85 86  
86 87 /* pc.c */
87 88 extern int fd_bootchk;
... ...