int
getextmemx()
{
int buf[5], i;
int extmem = getextmem1();
#ifdef SUPPORT_PS2
struct {
uint16_t len;
uint32_t dta[8];
/* pad to 64 bytes - without this, machine would reset */
uint8_t __pad[30];
} __packed bufps2;
#endif
#ifdef DEBUG_MEMSIZE
printf("extmem1: %xk\n", extmem);
#endif
if (!getextmem2(buf)) {
#ifdef DEBUG_MEMSIZE
printf("extmem2: %xk + %xk\n", buf[0], buf[1] * 64);
#endif
if (buf[0] <= 15 * 1024) {
int help = buf[0];
if (help == 15 * 1024)
help += buf[1] * 64;
if (extmem < help)
extmem = help;
}
}
i = 0;
do {
if (getmementry(&i, buf))
break;
#ifdef DEBUG_MEMSIZE
printf("mementry: (%d) %x %x %x %x %x\n",
i, buf[0], buf[1], buf[2], buf[3], buf[4]);
#endif
if ((buf[4] == 1 && buf[0] == 0x100000)
&& extmem < buf[2] / 1024)
extmem = buf[2] / 1024;
} while (i);
#ifdef SUPPORT_PS2
/* use local memory information from RETURN MEMORY-MAP INFORMATION */
if (!getextmemps2((void *) &bufps2)) {
int help = bufps2.dta[0];
if (help == 15 * 1024)
help += bufps2.dta[1];
if (extmem < help)
extmem = help;
}
#endif
return (extmem);
}
static int
common_load_kernel(const char *file, u_long *basemem, u_long *extmem,
physaddr_t loadaddr, int floppy, u_long marks[MARK_MAX])
{
int fd;
#ifdef XMS
u_long xmsmem;
physaddr_t origaddr = loadaddr;
#endif
*extmem = getextmem();
*basemem = getbasemem();
#ifdef XMS
if ((getextmem1() == 0) && (xmsmem = checkxms())) {
u_long kernsize;
/*
* With "CONSERVATIVE_MEMDETECT", extmem is 0 because
* getextmem() is getextmem1(). Without, the "smart"
* methods could fail to report all memory as well.
* xmsmem is a few kB less than the actual size, but
* better than nothing.
*/
if (xmsmem > *extmem)
*extmem = xmsmem;
/*
* Get the size of the kernel
*/
marks[MARK_START] = loadaddr;
if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1)
return EIO;
close(fd);
kernsize = marks[MARK_END];
kernsize = (kernsize + 1023) / 1024;
loadaddr = xmsalloc(kernsize);
if (!loadaddr)
return ENOMEM;
}
#endif
marks[MARK_START] = loadaddr;
if ((fd = loadfile(file, marks,
LOAD_KERNEL & ~(floppy ? LOAD_BACKWARDS : 0))) == -1)
return EIO;
close(fd);
/* Now we know the root fs type, load modules for it. */
if (fsmod != NULL)
module_add(fsmod);
if (fsmod !=NULL && fsmod2 != NULL && strcmp(fsmod, fsmod2) != 0)
module_add(fsmod2);
/*
* Gather some information for the kernel. Do this after the
* "point of no return" to avoid memory leaks.
* (but before DOS might be trashed in the XMS case)
*/
#ifdef PASS_BIOSGEOM
bi_getbiosgeom();
#endif
#ifdef PASS_MEMMAP
bi_getmemmap();
#endif
#ifdef XMS
if (loadaddr != origaddr) {
/*
* We now have done our last DOS IO, so we may
* trash the OS. Copy the data from the temporary
* buffer to its real address.
*/
marks[MARK_START] -= loadaddr;
marks[MARK_END] -= loadaddr;
marks[MARK_SYM] -= loadaddr;
marks[MARK_END] -= loadaddr;
ppbcopy(loadaddr, origaddr, marks[MARK_END]);
}
#endif
marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) &
(-sizeof(int));
image_end = marks[MARK_END];
kernel_loaded = true;
return 0;
}
