/* Move cursor to x rows and y cols (0-based). */
void
curs_move(int *_x, int *_y, int x, int y)
{
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0200;
v86.ebx = 0x0;
v86.edx = ((0x00ff & y) << 8) + (0x00ff & x);
v86int();
*_x = x;
*_y = y;
/* If there is ctrl char at this position, cursor would be invisible.
* Make it a space instead.
*/
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0800;
v86.ebx = 0x0;
v86int();
#define isvisible(c) (((c) >= 32) && ((c) < 255))
if (!isvisible(v86.eax & 0x00ff)) {
write_char(' ', fg_c, bg_c);
}
}
/* Clear display from current position to end of screen */
void
CD(void)
{
get_pos(&curx, &cury);
if (curx > 0) {
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0600;
v86.ebx = (bg_c << 4) + fg_c;
v86.ecx = (cury << 8) + curx;
v86.edx = (cury << 8) + 79;
v86int();
if (++cury > 24) {
end_term();
return;
}
}
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0600;
v86.ebx = (bg_c << 4) + fg_c;
v86.ecx = (cury << 8) + 0;
v86.edx = (24 << 8) + 79;
v86int();
end_term();
}
uint32_t
tcg_hash_extend(uint32_t addr, uint32_t len, uint32_t pcr)
{
struct TCG_HashAll tcg_hash_all;
struct TCG_PassTroughtToTPM tcg_passtrough_to_tpm;
char _unused[0x22];
tcg_hash_all.ipb_length = 0x0010;
tcg_hash_all._reserved = 0x0000;
tcg_hash_all.hash_data_ptr = addr;
tcg_hash_all.hash_data_len = len;
tcg_hash_all.algorithm_id = TPM_ALGO_SHA1;
tcg_passtrough_to_tpm.ipb_length = 0x002a;
tcg_passtrough_to_tpm._reserved1 = 0x0000;
tcg_passtrough_to_tpm.opb_length = 0x0022;
tcg_passtrough_to_tpm._reserved2 = 0x0000;
tcg_passtrough_to_tpm.tpm_tag = __htons(TPM_TAG_RQU_COMMAND);
tcg_passtrough_to_tpm.input_size = __htonl(0x00000022);
tcg_passtrough_to_tpm.cmd_ordinal = __htonl(TPM_ORD_Extend);
tcg_passtrough_to_tpm.pcr = __htonl(pcr);
v86.addr = 0x1a;
v86.eax = 0xbb05;
v86.ebx = TCG_MAGIC;
v86.ecx = 0x00000000;
v86.edx = 0x00000000;
v86.es = VTOPSEG(&tcg_hash_all);
v86.edi = VTOPOFF(&tcg_hash_all);
v86.ds = VTOPSEG(&tcg_passtrough_to_tpm.hash);
v86.esi = VTOPOFF(&tcg_passtrough_to_tpm.hash);
v86int();
if (v86.eax != TCG_PC_OK)
return (v86.eax);
v86.addr = 0x1a;
v86.eax = 0xbb02;
v86.ebx = TCG_MAGIC;
v86.ecx = 0x00000000;
v86.edx = 0x00000000;
v86.es = VTOPSEG(&tcg_passtrough_to_tpm);
v86.edi = VTOPOFF(&tcg_passtrough_to_tpm);
v86.ds = VTOPSEG(&_unused);
v86.esi = VTOPOFF(&_unused);
v86int();
return (v86.eax);
}
static inline uint32_t
memsize(void)
{
v86.addr = MEM_EXT;
v86.eax = 0x8800;
v86int();
return v86.eax;
}
static inline void
putc(int c)
{
v86.addr = 0x10;
v86.eax = 0xe00 | (c & 0xff);
v86.ebx = 0x7;
v86int();
}
static int
vidc_ischar(void)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x16;
v86.eax = 0x100;
v86int();
return(!(v86.efl & PSL_Z));
}
static void
vidc_biosputchar(int c)
{
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0xe00 | (c & 0xff);
v86.ebx = 0x7;
v86int();
}
static int
vidc_ischar(void)
{
v86.ctl = 0;
v86.addr = 0x18;
v86.eax = 0x100;
v86int();
return ((v86.ebx >> 8) & 0x1);
}
void
putc(int c)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x10;
v86.eax = 0xe00 | (c & 0xff);
v86.ebx = 0x7;
v86int();
}
/* Write character and attribute at cursor position. */
void
write_char(int c, int fg, int bg)
{
v86.ctl=0;
v86.addr = 0x10;
v86.eax = 0x0900+(0x00ff & c);
v86.ebx = (bg<<4)+fg;
v86.ecx = 0x1;
v86int();
}
void
bios_getsmap(void)
{
int n;
n = 0;
smaplen = 0;
/* Count up segments in system memory map */
v86.ebx = 0;
do {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe820*/
v86.eax = 0xe820;
v86.ecx = sizeof(struct smap);
v86.edx = SMAPSIG;
v86.es = VTOPSEG(&smap);
v86.edi = VTOPOFF(&smap);
v86int();
if ((v86.efl & 1) || (v86.eax != SMAPSIG))
break;
n++;
} while (v86.ebx != 0);
if (n == 0)
return;
n += 10; /* spare room */
smapbase = malloc(n * sizeof(*smapbase));
/* Save system memory map */
v86.ebx = 0;
do {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe820*/
v86.eax = 0xe820;
v86.ecx = sizeof(struct smap);
v86.edx = SMAPSIG;
v86.es = VTOPSEG(&smapbase[smaplen]);
v86.edi = VTOPOFF(&smapbase[smaplen]);
v86int();
smaplen++;
if ((v86.efl & 1) || (v86.eax != SMAPSIG))
break;
} while (v86.ebx != 0 && smaplen < n);
}
/* Get cursor position on the screen. Result is in edx. Sets
* curx and cury appropriately.
*/
void
get_pos(void)
{
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0300;
v86.ebx = 0x0;
v86int();
curx=v86.edx & 0x00ff;
cury=(v86.edx & 0xff00)>>8;
}
/* Get cursor position on the screen. Result is in edx. Sets
* curx and cury appropriately.
*/
void
get_pos(int *x, int *y)
{
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0300;
v86.ebx = 0x0;
v86int();
*x = v86.edx & 0x00ff;
*y = (v86.edx & 0xff00) >> 8;
}
/* Scroll up the whole window by a number of rows. If rows==0,
* clear the window. fg and bg are attributes for the new lines
* inserted in the window.
*/
void
scroll_up(int rows, int fg, int bg)
{
if(rows==0) rows=25;
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0600+(0x00ff & rows);
v86.ebx = (bg<<12)+(fg<<8);
v86.ecx = 0x0;
v86.edx = 0x184f;
v86int();
}
static int
vidc_getchar(void)
{
if (vidc_ischar()) {
v86.ctl = 0;
v86.addr = 0x16;
v86.eax = 0x0;
v86int();
return(v86.eax & 0xff);
} else {
return(-1);
}
}
uint32_t
tcg_status_check(void)
{
if (tpm_enabled == 0xff) {
v86.addr = 0x1a;
v86.eax = 0xbb00;
v86int();
tpm_enabled = v86.eax;
}
return (tpm_enabled);
}
/* Clear display from current position to end of screen */
void
CD(void)
{
get_pos();
v86.ctl = 0;
v86.addr = 0x10;
v86.eax = 0x0600;
v86.ebx = (bg_c<<4)+fg_c;
v86.ecx = v86.edx;
v86.edx = 0x184f;
v86int();
curx=0;
curs_move(curx,cury);
end_term();
}
int
getc(int fn)
{
/*
* The extra comparison against zero is an attempt to work around
* what appears to be a bug in QEMU and Bochs. Both emulators
* sometimes report a key-press with scancode one and ascii zero
* when no such key is pressed in reality. As far as I can tell,
* this only happens shortly after a reboot.
*/
v86.ctl = V86_FLAGS;
v86.addr = 0x16;
v86.eax = fn << 8;
v86int();
return fn == 0 ? v86.eax & 0xff : (!V86_ZR(v86.efl) && (v86.eax & 0xff));
}
/*
* Use the BIOS Wait function to pause for (period) microseconds.
*
* Resolution of this function is variable, but typically around
* 1ms.
*/
void
delay(int period)
{
#ifdef PC98
int i;
period = (period + 500) / 1000;
for( ; period != 0 ; period--)
for(i=800;i != 0; i--)
outb(0x5f,0); /* wait 600ns */
#else
v86.ctl = 0;
v86.addr = 0x15; /* int 0x15, function 0x86 */
v86.eax = 0x8600;
v86.ecx = period >> 16;
v86.edx = period & 0xffff;
v86int();
#endif
}
static int
bd_int13probe(struct bdinfo *bd)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x13;
v86.eax = 0x800;
v86.edx = bd->bd_unit;
v86int();
if (!(v86.efl & 0x1) && /* carry clear */
((v86.edx & 0xff) > (bd->bd_unit & 0x7f))) { /* unit # OK */
bd->bd_flags |= BD_MODEINT13;
bd->bd_type = v86.ebx & 0xff;
return(1);
}
return(0);
}
/*
* Return the BIOS time-of-day value.
*
* XXX uses undocumented BCD support from libstand.
*/
static int
bios_seconds(void)
{
int hr, minute, sec;
unsigned char bios_time[6];
v86.ctl = 0;
v86.addr = 0x1c; /* int 0x1c, function 0 */
v86.eax = 0x0000;
v86.es = VTOPSEG(bios_time);
v86.ebx = VTOPOFF(bios_time);
v86int();
hr = bcd2bin(bios_time[3]);
minute = bcd2bin(bios_time[4]);
sec = bcd2bin(bios_time[5]);
return (hr * 3600 + minute * 60 + sec);
}
time_t
time(time_t *t)
{
static time_t lasttime, now;
int hr, min, sec;
#ifdef PC98
unsigned char bios_time[6];
#endif
v86.ctl = 0;
#ifdef PC98
v86.addr = 0x1c; /* int 0x1c, function 0 */
v86.eax = 0x0000;
v86.es = VTOPSEG(bios_time);
v86.ebx = VTOPOFF(bios_time);
#else
v86.addr = 0x1a; /* int 0x1a, function 2 */
v86.eax = 0x0200;
#endif
v86int();
#ifdef PC98
hr = bcd2bin(bios_time[3]);
min = bcd2bin(bios_time[4]);
sec = bcd2bin(bios_time[5]);
#else
hr = bcd2bin((v86.ecx & 0xff00) >> 8); /* hour in %ch */
min = bcd2bin(v86.ecx & 0xff); /* minute in %cl */
sec = bcd2bin((v86.edx & 0xff00) >> 8); /* second in %dh */
#endif
now = hr * 3600 + min * 60 + sec;
if (now < lasttime)
now += 24 * 3600;
lasttime = now;
if (t != NULL)
*t = now;
return(now);
}
void
bios_getmem(void)
{
uint64_t size;
/* Parse system memory map */
v86.ebx = 0;
do {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe820*/
v86.eax = 0xe820;
v86.ecx = sizeof(struct bios_smap_xattr);
v86.edx = SMAP_SIG;
v86.es = VTOPSEG(&smap);
v86.edi = VTOPOFF(&smap);
v86int();
if ((V86_CY(v86.efl)) || (v86.eax != SMAP_SIG))
break;
/* look for a low-memory segment that's large enough */
if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) &&
(smap.length >= (512 * 1024))) {
bios_basemem = smap.length;
b_bios_probed |= B_BASEMEM_E820;
}
/* look for the first segment in 'extended' memory */
if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000) &&
!(bios_getquirks() & BQ_DISTRUST_E820_EXTMEM)) {
bios_extmem = smap.length;
b_bios_probed |= B_EXTMEM_E820;
}
/*
* Look for the largest segment in 'extended' memory beyond
* 1MB but below 4GB.
*/
if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) &&
(smap.base < 0x100000000ull)) {
size = smap.length;
/*
* If this segment crosses the 4GB boundary, truncate it.
*/
if (smap.base + size > 0x100000000ull)
size = 0x100000000ull - smap.base;
if (size > high_heap_size) {
high_heap_size = size;
high_heap_base = smap.base;
}
}
} while (v86.ebx != 0);
/* Fall back to the old compatibility function for base memory */
if (bios_basemem == 0) {
v86.ctl = 0;
v86.addr = 0x12; /* int 0x12 */
v86int();
bios_basemem = (v86.eax & 0xffff) * 1024;
b_bios_probed |= B_BASEMEM_12;
}
/* Fall back through several compatibility functions for extended memory */
if (bios_extmem == 0) {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe801*/
v86.eax = 0xe801;
v86int();
if (!(V86_CY(v86.efl))) {
/*
* Clear high_heap; it may end up overlapping
* with the segment we're determining here.
* Let the default "steal stuff from top of
* bios_extmem" code below pick up on it.
*/
high_heap_size = 0;
high_heap_base = 0;
/*
* %cx is the number of 1KiB blocks between 1..16MiB.
* It can only be up to 0x3c00; if it's smaller then
* there's a PC AT memory hole so we can't treat
* it as contiguous.
*/
bios_extmem = (v86.ecx & 0xffff) * 1024;
if (bios_extmem == (1024 * 0x3c00))
bios_extmem += (v86.edx & 0xffff) * 64 * 1024;
/* truncate bios_extmem */
if (bios_extmem > 0x3ff00000)
bios_extmem = 0x3ff00000;
b_bios_probed |= B_EXTMEM_E801;
}
}
if (bios_extmem == 0) {
v86.ctl = 0;
v86.addr = 0x15; /* int 0x15 function 0x88*/
v86.eax = 0x8800;
v86int();
bios_extmem = (v86.eax & 0xffff) * 1024;
b_bios_probed |= B_EXTMEM_8800;
}
/* Set memtop to actual top of memory */
memtop = memtop_copyin = 0x100000 + bios_extmem;
/*
* If we have extended memory and did not find a suitable heap
* region in the SMAP, use the last 3MB of 'extended' memory as a
* high heap candidate.
*/
if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) {
high_heap_size = HEAP_MIN;
high_heap_base = memtop - HEAP_MIN;
}
}
void
bios_getsmap(void)
{
struct smap_buf buf;
STAILQ_HEAD(smap_head, smap_buf) head =
STAILQ_HEAD_INITIALIZER(head);
struct smap_buf *cur, *next;
u_int n, x;
STAILQ_INIT(&head);
n = 0;
x = 0;
v86.ebx = 0;
do {
v86.ctl = V86_FLAGS;
v86.addr = 0x15;
v86.eax = 0xe820; /* int 0x15 function 0xe820 */
v86.ecx = SMAP_BUFSIZE;
v86.edx = SMAP_SIG;
v86.es = VTOPSEG(&buf);
v86.edi = VTOPOFF(&buf);
v86int();
if (V86_CY(v86.efl) || v86.eax != SMAP_SIG ||
v86.ecx < sizeof(buf.smap) || v86.ecx > SMAP_BUFSIZE)
break;
next = malloc(sizeof(*next));
if (next == NULL)
break;
next->smap = buf.smap;
if (v86.ecx == SMAP_BUFSIZE) {
next->xattr = buf.xattr;
x++;
}
STAILQ_INSERT_TAIL(&head, next, bufs);
n++;
} while (v86.ebx != 0);
smaplen = n;
if (smaplen > 0) {
smapbase = malloc(smaplen * sizeof(*smapbase));
if (smapbase != NULL) {
n = 0;
STAILQ_FOREACH(cur, &head, bufs)
smapbase[n++] = cur->smap;
}
if (smaplen == x) {
smapattr = malloc(smaplen * sizeof(*smapattr));
if (smapattr != NULL) {
n = 0;
STAILQ_FOREACH(cur, &head, bufs)
smapattr[n++] = cur->xattr &
SMAP_XATTR_MASK;
}
} else
smapattr = NULL;
cur = STAILQ_FIRST(&head);
while (cur != NULL) {
next = STAILQ_NEXT(cur, bufs);
free(cur);
cur = next;
}
}
}
void
bios_getmem(void)
{
uint64_t size;
/* Parse system memory map */
v86.ebx = 0;
do {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe820*/
v86.eax = 0xe820;
v86.ecx = sizeof(struct bios_smap);
v86.edx = SMAP_SIG;
v86.es = VTOPSEG(&smap);
v86.edi = VTOPOFF(&smap);
v86int();
if ((V86_CY(v86.efl)) || (v86.eax != SMAP_SIG))
break;
/* look for a low-memory segment that's large enough */
if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) &&
(smap.length >= (512 * 1024)))
bios_basemem = smap.length;
/* look for the first segment in 'extended' memory */
if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000)) {
bios_extmem = smap.length;
}
/*
* Look for the largest segment in 'extended' memory beyond
* 1MB but below 4GB.
*/
if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) &&
(smap.base < 0x100000000ull)) {
size = smap.length;
/*
* If this segment crosses the 4GB boundary, truncate it.
*/
if (smap.base + size > 0x100000000ull)
size = 0x100000000ull - smap.base;
if (size > high_heap_size) {
high_heap_size = size;
high_heap_base = smap.base;
}
}
} while (v86.ebx != 0);
/* Fall back to the old compatibility function for base memory */
if (bios_basemem == 0) {
v86.ctl = 0;
v86.addr = 0x12; /* int 0x12 */
v86int();
bios_basemem = (v86.eax & 0xffff) * 1024;
}
/* Fall back through several compatibility functions for extended memory */
if (bios_extmem == 0) {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe801*/
v86.eax = 0xe801;
v86int();
if (!(V86_CY(v86.efl))) {
bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024;
}
}
if (bios_extmem == 0) {
v86.ctl = 0;
v86.addr = 0x15; /* int 0x15 function 0x88*/
v86.eax = 0x8800;
v86int();
bios_extmem = (v86.eax & 0xffff) * 1024;
}
/* Set memtop to actual top of memory */
memtop = memtop_copyin = 0x100000 + bios_extmem;
/*
* If we have extended memory and did not find a suitable heap
* region in the SMAP, use the last 3MB of 'extended' memory as a
* high heap candidate.
*/
if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) {
high_heap_size = HEAP_MIN;
high_heap_base = memtop - HEAP_MIN;
}
}
void
bios_getsmap(void)
{
int n;
n = 0;
smaplen = 0;
/* Count up segments in system memory map */
v86.ebx = 0;
do {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe820*/
v86.eax = 0xe820;
v86.ecx = sizeof(struct smap);
v86.edx = SMAPSIG;
v86.es = VTOPSEG(&smap);
v86.edi = VTOPOFF(&smap);
v86int();
if ((v86.efl & 1) || (v86.eax != SMAPSIG))
break;
n++;
} while (v86.ebx != 0);
if (n == 0)
return;
n += 10; /* spare room */
smapbase = malloc(n * sizeof(*smapbase));
/* Save system memory map */
v86.ebx = 0;
do {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe820*/
v86.eax = 0xe820;
v86.ecx = sizeof(struct smap);
v86.edx = SMAPSIG;
v86.es = VTOPSEG(&smap);
v86.edi = VTOPOFF(&smap);
v86int();
/*
* Our heap is now in high memory and must be removed from
* the smap so the kernel does not blow away passed-in
* arguments, smap, kenv, etc.
*
* This wastes a little memory.
*/
if (smap.type == 1 &&
smap.base + smap.length > heapbase &&
smap.base < memtop) {
if (smap.base <= heapbase) {
if (heapbase - smap.base) {
smapbase[smaplen] = smap;
smapbase[smaplen].length =
heapbase - smap.base;
++smaplen;
}
}
if (smap.base + smap.length >= memtop) {
if (smap.base + smap.length - memtop) {
smapbase[smaplen] = smap;
smapbase[smaplen].base = memtop;
smapbase[smaplen].length =
smap.base + smap.length -
memtop;
++smaplen;
}
}
} else {
smapbase[smaplen] = smap;
++smaplen;
}
if ((v86.efl & 1) || (v86.eax != SMAPSIG))
break;
} while (v86.ebx != 0 && smaplen < n);
}