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Work around KVM unreal mode bug by avoiding unreal mode

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This commit is contained in:
Erik van der Kouwe 2010-03-10 15:32:31 +00:00
parent 5df6b80093
commit da25ecf758
1 changed files with 9 additions and 4 deletions
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13
boot/bootimage.c
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@ -109,16 +109,20 @@ void pretty_image(char *image)
} }
} }
#define RAW_ALIGN 16
#define BUFSIZE_ZEROS 128
void raw_clear(u32_t addr, u32_t count) void raw_clear(u32_t addr, u32_t count)
/* Clear "count" bytes at absolute address "addr". */ /* Clear "count" bytes at absolute address "addr". */
{ {
static char zeros[128]; static char zerosdata[BUFSIZE_ZEROS + RAW_ALIGN];
char *zeros = zerosdata + RAW_ALIGN - (unsigned) &zerosdata % RAW_ALIGN;
u32_t dst; u32_t dst;
u32_t zct; u32_t zct;
zct= sizeof(zeros); zct= BUFSIZE_ZEROS;
if (zct > count) zct= count; if (zct > count) zct= count;
raw_copy(addr, mon2abs(&zeros), zct); raw_copy(addr, mon2abs(zeros), zct);
count-= zct; count-= zct;
while (count > 0) { while (count > 0) {
@ -289,9 +293,10 @@ char *get_sector(u32_t vsec)
u32_t sec; u32_t sec;
int r; int r;
#define SECBUFS 16 #define SECBUFS 16
static char buf[SECBUFS * SECTOR_SIZE]; static char bufdata[SECBUFS * SECTOR_SIZE + RAW_ALIGN];
static size_t count; /* Number of sectors in the buffer. */ static size_t count; /* Number of sectors in the buffer. */
static u32_t bufsec; /* First Sector now in the buffer. */ static u32_t bufsec; /* First Sector now in the buffer. */
char *buf = bufdata + RAW_ALIGN - (unsigned) &bufdata % RAW_ALIGN;
if (vsec == 0) count= 0; /* First sector; initialize. */ if (vsec == 0) count= 0; /* First sector; initialize. */