forked from KolibriOS/kolibrios
699 lines
18 KiB
C
699 lines
18 KiB
C
#include <drm/drmP.h>
|
|
#include <drm.h>
|
|
#include <drm/i915_drm.h>
|
|
#include "i915_drv.h"
|
|
//#include "intel_drv.h"
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <errno-base.h>
|
|
#include <linux/pci.h>
|
|
#include <syscall.h>
|
|
|
|
#include "bitmap.h"
|
|
|
|
struct pci_device {
|
|
uint16_t domain;
|
|
uint8_t bus;
|
|
uint8_t dev;
|
|
uint8_t func;
|
|
uint16_t vendor_id;
|
|
uint16_t device_id;
|
|
uint16_t subvendor_id;
|
|
uint16_t subdevice_id;
|
|
uint32_t device_class;
|
|
uint8_t revision;
|
|
};
|
|
|
|
struct drm_device *main_device;
|
|
struct drm_file *drm_file_handlers[256];
|
|
videomode_t usermode;
|
|
|
|
void cpu_detect();
|
|
|
|
int _stdcall display_handler(ioctl_t *io);
|
|
int init_agp(void);
|
|
|
|
int srv_blit_bitmap(u32 hbitmap, int dst_x, int dst_y,
|
|
int src_x, int src_y, u32 w, u32 h);
|
|
|
|
int blit_textured(u32 hbitmap, int dst_x, int dst_y,
|
|
int src_x, int src_y, u32 w, u32 h);
|
|
|
|
int blit_tex(u32 hbitmap, int dst_x, int dst_y,
|
|
int src_x, int src_y, u32 w, u32 h);
|
|
|
|
void get_pci_info(struct pci_device *dev);
|
|
int i915_getparam(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv);
|
|
|
|
int i915_mask_update(struct drm_device *dev, void *data,
|
|
struct drm_file *file);
|
|
|
|
struct cmdtable cmdtable[]= {
|
|
CMDENTRY("-pm=", i915_powersave),
|
|
CMDENTRY("-rc6=", i915_enable_rc6),
|
|
CMDENTRY("-fbc=", i915_enable_fbc),
|
|
CMDENTRY("-ppgt=", i915_enable_ppgtt),
|
|
CMDENTRY("-pc8=", i915_enable_pc8),
|
|
{NULL, 0}
|
|
};
|
|
|
|
|
|
static char log[256];
|
|
|
|
struct workqueue_struct *system_wq;
|
|
int driver_wq_state;
|
|
|
|
int x86_clflush_size;
|
|
unsigned int tsc_khz;
|
|
|
|
int i915_modeset = 1;
|
|
|
|
typedef union __attribute__((packed))
|
|
{
|
|
uint32_t val;
|
|
struct
|
|
{
|
|
uint8_t state;
|
|
uint8_t code;
|
|
uint16_t ctrl_key;
|
|
};
|
|
}oskey_t;
|
|
|
|
static inline oskey_t get_key(void)
|
|
{
|
|
oskey_t val;
|
|
asm volatile("int $0x40":"=a"(val):"a"(2));
|
|
return val;
|
|
};
|
|
|
|
void i915_dpms(struct drm_device *dev, int mode);
|
|
|
|
void i915_driver_thread()
|
|
{
|
|
struct drm_i915_private *dev_priv = main_device->dev_private;
|
|
struct workqueue_struct *cwq = dev_priv->wq;
|
|
static int dpms = 1;
|
|
static int dpms_lock = 0;
|
|
oskey_t key;
|
|
unsigned long irqflags;
|
|
int tmp;
|
|
|
|
printf("%s\n",__FUNCTION__);
|
|
|
|
asm volatile("int $0x40":"=a"(tmp):"a"(66),"b"(1),"c"(1));
|
|
asm volatile("int $0x40":"=a"(tmp):"a"(66),"b"(4),"c"(0x46),"d"(0x330));
|
|
asm volatile("int $0x40":"=a"(tmp):"a"(66),"b"(4),"c"(0xC6),"d"(0x330));
|
|
|
|
while(driver_wq_state != 0)
|
|
{
|
|
key = get_key();
|
|
|
|
if( (key.val != 1) && (key.state == 0x02))
|
|
{
|
|
if(key.code == 0x46 && dpms_lock == 0)
|
|
{
|
|
dpms_lock = 1;
|
|
if(dpms == 1)
|
|
{
|
|
i915_dpms(main_device, DRM_MODE_DPMS_OFF);
|
|
printf("dpms off\n");
|
|
}
|
|
else
|
|
{
|
|
i915_dpms(main_device, DRM_MODE_DPMS_ON);
|
|
printf("dpms on\n");
|
|
};
|
|
dpms ^= 1;
|
|
}
|
|
else if(key.code == 0xC6)
|
|
dpms_lock = 0;
|
|
};
|
|
|
|
spin_lock_irqsave(&cwq->lock, irqflags);
|
|
|
|
while (!list_empty(&cwq->worklist))
|
|
{
|
|
struct work_struct *work = list_entry(cwq->worklist.next,
|
|
struct work_struct, entry);
|
|
work_func_t f = work->func;
|
|
list_del_init(cwq->worklist.next);
|
|
|
|
spin_unlock_irqrestore(&cwq->lock, irqflags);
|
|
f(work);
|
|
spin_lock_irqsave(&cwq->lock, irqflags);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&cwq->lock, irqflags);
|
|
|
|
delay(1);
|
|
};
|
|
|
|
asm volatile ("int $0x40"::"a"(-1));
|
|
}
|
|
|
|
u32_t __attribute__((externally_visible)) drvEntry(int action, char *cmdline)
|
|
{
|
|
int err = 0;
|
|
|
|
if(action != 1)
|
|
{
|
|
driver_wq_state = 0;
|
|
return 0;
|
|
};
|
|
|
|
if( GetService("DISPLAY") != 0 )
|
|
return 0;
|
|
|
|
printf("i915 v3.12\n\nusage: i915 [options]\n"
|
|
"-pm=<0,1> Enable powersavings, fbc, downclocking, etc. (default: 0 - false)\n");
|
|
printf("-rc6=<-1,0-7> Enable power-saving render C-state 6.\n"
|
|
" Different stages can be selected via bitmask values\n"
|
|
" (0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6).\n"
|
|
" For example, 3 would enable rc6 and deep rc6, and 7 would enable everything.\n"
|
|
" default: -1 (use per-chip default)\n");
|
|
printf("-fbc=<-1,0,1> Enable frame buffer compression for power savings\n"
|
|
" (default: 0 - false)\n");
|
|
printf("-ppgt=<0,1> Enable PPGTT (default: 0 - false)\n");
|
|
printf("-pc8=<0,1> Enable support for low power package C states (PC8+) (default: 0 - false)\n");
|
|
printf("-l<path> path to log file\n");
|
|
printf("-m<WxHxHz> set videomode\n");
|
|
|
|
if( cmdline && *cmdline )
|
|
parse_cmdline(cmdline, cmdtable, log, &usermode);
|
|
|
|
if(!dbg_open(log))
|
|
{
|
|
strcpy(log, "/tmp1/1/i915.log");
|
|
|
|
if(!dbg_open(log))
|
|
{
|
|
printf("Can't open %s\nExit\n", log);
|
|
return 0;
|
|
};
|
|
}
|
|
|
|
cpu_detect();
|
|
// dbgprintf("\ncache line size %d\n", x86_clflush_size);
|
|
|
|
enum_pci_devices();
|
|
|
|
err = i915_init();
|
|
if(err)
|
|
{
|
|
dbgprintf("Epic Fail :(\n");
|
|
return 0;
|
|
};
|
|
|
|
init_display_kms(main_device, &usermode);
|
|
|
|
err = RegService("DISPLAY", display_handler);
|
|
|
|
if( err != 0)
|
|
dbgprintf("Set DISPLAY handler\n");
|
|
|
|
driver_wq_state = 1;
|
|
|
|
CreateKernelThread(i915_driver_thread);
|
|
|
|
return err;
|
|
};
|
|
|
|
|
|
#define CURRENT_API 0x0200 /* 2.00 */
|
|
#define COMPATIBLE_API 0x0100 /* 1.00 */
|
|
|
|
#define API_VERSION (COMPATIBLE_API << 16) | CURRENT_API
|
|
#define DISPLAY_VERSION API_VERSION
|
|
|
|
|
|
#define SRV_GETVERSION 0
|
|
#define SRV_ENUM_MODES 1
|
|
#define SRV_SET_MODE 2
|
|
#define SRV_GET_CAPS 3
|
|
|
|
#define SRV_CREATE_SURFACE 10
|
|
#define SRV_DESTROY_SURFACE 11
|
|
#define SRV_LOCK_SURFACE 12
|
|
#define SRV_UNLOCK_SURFACE 13
|
|
#define SRV_RESIZE_SURFACE 14
|
|
#define SRV_BLIT_BITMAP 15
|
|
#define SRV_BLIT_TEXTURE 16
|
|
#define SRV_BLIT_VIDEO 17
|
|
|
|
|
|
#define SRV_GET_PCI_INFO 20
|
|
#define SRV_I915_GET_PARAM 21
|
|
#define SRV_I915_GEM_CREATE 22
|
|
#define SRV_DRM_GEM_CLOSE 23
|
|
#define SRV_DRM_GEM_FLINK 24
|
|
#define SRV_DRM_GEM_OPEN 25
|
|
#define SRV_I915_GEM_PIN 26
|
|
#define SRV_I915_GEM_UNPIN 27
|
|
#define SRV_I915_GEM_SET_CACHING 28
|
|
#define SRV_I915_GEM_PWRITE 29
|
|
#define SRV_I915_GEM_BUSY 30
|
|
#define SRV_I915_GEM_SET_DOMAIN 31
|
|
#define SRV_I915_GEM_MMAP 32
|
|
#define SRV_I915_GEM_SET_TILING 33
|
|
#define SRV_I915_GEM_GET_TILING 34
|
|
#define SRV_I915_GEM_GET_APERTURE 35
|
|
#define SRV_I915_GEM_MMAP_GTT 36
|
|
#define SRV_I915_GEM_THROTTLE 37
|
|
#define SRV_I915_GEM_EXECBUFFER2 38
|
|
#define SRV_I915_GEM_WAIT 39
|
|
#define SRV_I915_GEM_CONTEXT_CREATE 40
|
|
#define SRV_I915_GEM_CONTEXT_DESTROY 41
|
|
#define SRV_I915_REG_READ 42
|
|
|
|
#define SRV_FBINFO 43
|
|
#define SRV_MASK_UPDATE 44
|
|
|
|
|
|
#define check_input(size) \
|
|
if( unlikely((inp==NULL)||(io->inp_size != (size))) ) \
|
|
break;
|
|
|
|
#define check_output(size) \
|
|
if( unlikely((outp==NULL)||(io->out_size != (size))) ) \
|
|
break;
|
|
|
|
int _stdcall display_handler(ioctl_t *io)
|
|
{
|
|
struct drm_file *file;
|
|
|
|
int retval = -1;
|
|
u32_t *inp;
|
|
u32_t *outp;
|
|
|
|
inp = io->input;
|
|
outp = io->output;
|
|
|
|
file = drm_file_handlers[0];
|
|
|
|
switch(io->io_code)
|
|
{
|
|
case SRV_GETVERSION:
|
|
check_output(4);
|
|
*outp = DISPLAY_VERSION;
|
|
retval = 0;
|
|
break;
|
|
|
|
case SRV_ENUM_MODES:
|
|
// dbgprintf("SRV_ENUM_MODES inp %x inp_size %x out_size %x\n",
|
|
// inp, io->inp_size, io->out_size );
|
|
check_output(4);
|
|
// check_input(*outp * sizeof(videomode_t));
|
|
if( i915_modeset)
|
|
retval = get_videomodes((videomode_t*)inp, outp);
|
|
break;
|
|
|
|
case SRV_SET_MODE:
|
|
// dbgprintf("SRV_SET_MODE inp %x inp_size %x\n",
|
|
// inp, io->inp_size);
|
|
check_input(sizeof(videomode_t));
|
|
if( i915_modeset )
|
|
retval = set_user_mode((videomode_t*)inp);
|
|
break;
|
|
|
|
case SRV_GET_CAPS:
|
|
retval = get_driver_caps((hwcaps_t*)inp);
|
|
break;
|
|
|
|
case SRV_CREATE_SURFACE:
|
|
// check_input(8);
|
|
// retval = create_surface(main_device, (struct io_call_10*)inp);
|
|
break;
|
|
|
|
case SRV_LOCK_SURFACE:
|
|
// retval = lock_surface((struct io_call_12*)inp);
|
|
break;
|
|
|
|
case SRV_RESIZE_SURFACE:
|
|
// retval = resize_surface((struct io_call_14*)inp);
|
|
break;
|
|
|
|
case SRV_BLIT_BITMAP:
|
|
// srv_blit_bitmap( inp[0], inp[1], inp[2],
|
|
// inp[3], inp[4], inp[5], inp[6]);
|
|
|
|
// blit_tex( inp[0], inp[1], inp[2],
|
|
// inp[3], inp[4], inp[5], inp[6]);
|
|
|
|
break;
|
|
|
|
case SRV_GET_PCI_INFO:
|
|
get_pci_info((struct pci_device *)inp);
|
|
retval = 0;
|
|
break;
|
|
|
|
case SRV_I915_GET_PARAM:
|
|
retval = i915_getparam(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_CREATE:
|
|
retval = i915_gem_create_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_DRM_GEM_CLOSE:
|
|
retval = drm_gem_close_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_DRM_GEM_FLINK:
|
|
retval = drm_gem_flink_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_DRM_GEM_OPEN:
|
|
retval = drm_gem_open_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_PIN:
|
|
retval = i915_gem_pin_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_UNPIN:
|
|
retval = i915_gem_unpin_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_SET_CACHING:
|
|
retval = i915_gem_set_caching_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_PWRITE:
|
|
retval = i915_gem_pwrite_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_BUSY:
|
|
retval = i915_gem_busy_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_SET_DOMAIN:
|
|
retval = i915_gem_set_domain_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_MMAP:
|
|
retval = i915_gem_mmap_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_SET_TILING:
|
|
retval = i915_gem_set_tiling(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_GET_TILING:
|
|
retval = i915_gem_get_tiling(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_GET_APERTURE:
|
|
// printf("SRV_I915_GEM_GET_APERTURE ");
|
|
retval = i915_gem_get_aperture_ioctl(main_device, inp, file);
|
|
// printf(" retval=%d\n", retval);
|
|
break;
|
|
|
|
case SRV_I915_GEM_MMAP_GTT:
|
|
retval = i915_gem_mmap_gtt_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_THROTTLE:
|
|
retval = i915_gem_throttle_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_EXECBUFFER2:
|
|
// printf("SRV_I915_GEM_EXECBUFFER2\n");
|
|
retval = i915_gem_execbuffer2(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_WAIT:
|
|
retval = i915_gem_wait_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_CONTEXT_CREATE:
|
|
retval = i915_gem_context_create_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_GEM_CONTEXT_DESTROY:
|
|
retval = i915_gem_context_destroy_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_I915_REG_READ:
|
|
retval = i915_reg_read_ioctl(main_device, inp, file);
|
|
break;
|
|
|
|
case SRV_FBINFO:
|
|
retval = i915_fbinfo(inp);
|
|
break;
|
|
|
|
case SRV_MASK_UPDATE:
|
|
retval = i915_mask_update(main_device, inp, file);
|
|
break;
|
|
};
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
#define PCI_CLASS_REVISION 0x08
|
|
#define PCI_CLASS_DISPLAY_VGA 0x0300
|
|
#define PCI_CLASS_BRIDGE_HOST 0x0600
|
|
#define PCI_CLASS_BRIDGE_ISA 0x0601
|
|
|
|
int pci_scan_filter(u32_t id, u32_t busnr, u32_t devfn)
|
|
{
|
|
u16_t vendor, device;
|
|
u32_t class;
|
|
int ret = 0;
|
|
|
|
vendor = id & 0xffff;
|
|
device = (id >> 16) & 0xffff;
|
|
|
|
if(vendor == 0x8086)
|
|
{
|
|
class = PciRead32(busnr, devfn, PCI_CLASS_REVISION);
|
|
class >>= 16;
|
|
|
|
if( (class == PCI_CLASS_DISPLAY_VGA) ||
|
|
(class == PCI_CLASS_BRIDGE_HOST) ||
|
|
(class == PCI_CLASS_BRIDGE_ISA))
|
|
ret = 1;
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
|
|
|
|
|
|
static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
|
|
unsigned int *ecx, unsigned int *edx)
|
|
{
|
|
/* ecx is often an input as well as an output. */
|
|
asm volatile("cpuid"
|
|
: "=a" (*eax),
|
|
"=b" (*ebx),
|
|
"=c" (*ecx),
|
|
"=d" (*edx)
|
|
: "0" (*eax), "2" (*ecx)
|
|
: "memory");
|
|
}
|
|
|
|
|
|
|
|
static inline void cpuid(unsigned int op,
|
|
unsigned int *eax, unsigned int *ebx,
|
|
unsigned int *ecx, unsigned int *edx)
|
|
{
|
|
*eax = op;
|
|
*ecx = 0;
|
|
__cpuid(eax, ebx, ecx, edx);
|
|
}
|
|
|
|
void cpu_detect()
|
|
{
|
|
u32 junk, tfms, cap0, misc;
|
|
|
|
cpuid(0x00000001, &tfms, &misc, &junk, &cap0);
|
|
|
|
if (cap0 & (1<<19))
|
|
{
|
|
x86_clflush_size = ((misc >> 8) & 0xff) * 8;
|
|
}
|
|
|
|
tsc_khz = (unsigned int)(GetCpuFreq()/1000);
|
|
}
|
|
|
|
|
|
int get_driver_caps(hwcaps_t *caps)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch(caps->idx)
|
|
{
|
|
case 0:
|
|
caps->opt[0] = 0;
|
|
caps->opt[1] = 0;
|
|
break;
|
|
|
|
case 1:
|
|
caps->cap1.max_tex_width = 4096;
|
|
caps->cap1.max_tex_height = 4096;
|
|
break;
|
|
default:
|
|
ret = 1;
|
|
};
|
|
caps->idx = 1;
|
|
return ret;
|
|
}
|
|
|
|
|
|
void get_pci_info(struct pci_device *dev)
|
|
{
|
|
struct pci_dev *pdev = main_device->pdev;
|
|
|
|
memset(dev, sizeof(*dev), 0);
|
|
|
|
dev->domain = 0;
|
|
dev->bus = pdev->busnr;
|
|
dev->dev = pdev->devfn >> 3;
|
|
dev->func = pdev->devfn & 7;
|
|
dev->vendor_id = pdev->vendor;
|
|
dev->device_id = pdev->device;
|
|
dev->revision = pdev->revision;
|
|
};
|
|
|
|
|
|
|
|
char *strstr(const char *cs, const char *ct);
|
|
|
|
static int my_atoi(char **cmd)
|
|
{
|
|
char* p = *cmd;
|
|
int val = 0;
|
|
int sign = 1;
|
|
|
|
if(*p == '-')
|
|
{
|
|
sign = -1;
|
|
p++;
|
|
};
|
|
|
|
for (;; *p++) {
|
|
switch (*p) {
|
|
case '0' ... '9':
|
|
val = 10*val+(*p-'0');
|
|
break;
|
|
default:
|
|
*cmd = p;
|
|
return val*sign;
|
|
}
|
|
}
|
|
}
|
|
|
|
char* parse_mode(char *p, videomode_t *mode)
|
|
{
|
|
char c;
|
|
|
|
while( (c = *p++) == ' ');
|
|
|
|
if( c )
|
|
{
|
|
p--;
|
|
|
|
mode->width = my_atoi(&p);
|
|
if(*p == 'x') p++;
|
|
|
|
mode->height = my_atoi(&p);
|
|
if(*p == 'x') p++;
|
|
|
|
mode->bpp = 32;
|
|
|
|
mode->freq = my_atoi(&p);
|
|
|
|
if( mode->freq == 0 )
|
|
mode->freq = 60;
|
|
}
|
|
|
|
return p;
|
|
};
|
|
|
|
|
|
static char* parse_path(char *p, char *log)
|
|
{
|
|
char c;
|
|
|
|
while( (c = *p++) == ' ');
|
|
p--;
|
|
while( (c = *log++ = *p++) && (c != ' '));
|
|
*log = 0;
|
|
|
|
return p;
|
|
};
|
|
|
|
void parse_cmdline(char *cmdline, struct cmdtable *table, char *log, videomode_t *mode)
|
|
{
|
|
char *p = cmdline;
|
|
char *p1;
|
|
int val;
|
|
char c = *p++;
|
|
|
|
if( table )
|
|
{
|
|
while(table->key)
|
|
{
|
|
if(p1 = strstr(cmdline, table->key))
|
|
{
|
|
p1+= table->size;
|
|
*table->val = my_atoi(&p1);
|
|
// printf("%s %d\n", table->key, *table->val);
|
|
}
|
|
table++;
|
|
}
|
|
}
|
|
|
|
while( c )
|
|
{
|
|
if( c == '-')
|
|
{
|
|
switch(*p++)
|
|
{
|
|
case 'l':
|
|
p = parse_path(p, log);
|
|
break;
|
|
|
|
case 'm':
|
|
p = parse_mode(p, mode);
|
|
break;
|
|
};
|
|
};
|
|
c = *p++;
|
|
};
|
|
};
|
|
|
|
char *strstr(const char *cs, const char *ct)
|
|
{
|
|
int d0, d1;
|
|
register char *__res;
|
|
__asm__ __volatile__(
|
|
"movl %6,%%edi\n\t"
|
|
"repne\n\t"
|
|
"scasb\n\t"
|
|
"notl %%ecx\n\t"
|
|
"decl %%ecx\n\t" /* NOTE! This also sets Z if searchstring='' */
|
|
"movl %%ecx,%%edx\n"
|
|
"1:\tmovl %6,%%edi\n\t"
|
|
"movl %%esi,%%eax\n\t"
|
|
"movl %%edx,%%ecx\n\t"
|
|
"repe\n\t"
|
|
"cmpsb\n\t"
|
|
"je 2f\n\t" /* also works for empty string, see above */
|
|
"xchgl %%eax,%%esi\n\t"
|
|
"incl %%esi\n\t"
|
|
"cmpb $0,-1(%%eax)\n\t"
|
|
"jne 1b\n\t"
|
|
"xorl %%eax,%%eax\n\t"
|
|
"2:"
|
|
: "=a" (__res), "=&c" (d0), "=&S" (d1)
|
|
: "0" (0), "1" (0xffffffff), "2" (cs), "g" (ct)
|
|
: "dx", "di");
|
|
return __res;
|
|
}
|