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lib.c
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lib.c
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/* lib.c - MemTest-86 Version 3.4
*
* Released under version 2 of the Gnu Public License.
* By Chris Brady
*/
#include "io.h"
#include "serial.h"
#include "test.h"
#include "config.h"
#include "screen_buffer.h"
#include "stdint.h"
#include "cpuid.h"
#include "smp.h"
int slock = 0, lsr = 0;
short serial_cons = SERIAL_CONSOLE_DEFAULT;
#if SERIAL_TTY < 0 || SERIAL_TTY > 3
#error Bad SERIAL_TTY. Only ttyS0 thru ttyS3 are supported.
#endif
short serial_tty = SERIAL_TTY;
const short serial_base_ports[] = {0x3f8, 0x2f8, 0x3e8, 0x2e8};
#if ((115200%SERIAL_BAUD_RATE) != 0)
#error Bad default baud rate
#endif
int serial_baud_rate = SERIAL_BAUD_RATE;
unsigned char serial_parity = 0;
unsigned char serial_bits = 8;
extern int mstr_cpu, conservative_smp;
extern int smp_my_ord_num(int me);
struct ascii_map_str {
int ascii;
int keycode;
};
inline void reboot(void)
{
if (serial_cons) {
serial_echo_print("[H[2J");
serial_echo_print("Reboot requested...");
}
/* tell the BIOS to do a cold start */
*((unsigned short *)0x472) = 0x0;
while(1)
{
outb(0xFE, 0x64);
outb(0x02, 0xcf9); /* reset that doesn't rely on the keyboard controller */
outb(0x04, 0xcf9);
outb(0x0E, 0xcf9);
}
}
int strlen(const char *string)
{
int i = 0;
while (*string++)
i++;
return i;
}
int strstr(const char *haystack, const char *needle)
{
int haystack_len = strlen(haystack);
int needle_len = strlen(needle);
int max_idx = haystack_len - needle_len;
int idx;
for (idx = 0; idx <= max_idx; idx++) {
if (memcmp(haystack + idx, needle, needle_len) == 0)
return idx;
}
return -1;
}
int memcmp(const void *s1, const void *s2, ulong count)
{
const unsigned char *src1 = s1, *src2 = s2;
int i;
for(i = 0; i < count; i++) {
if (src1[i] != src2[i]) {
return (int)src1[i] - (int)src2[i];
}
}
return 0;
}
int strncmp(const char *s1, const char *s2, ulong n) {
signed char res = 0;
while (n) {
res = *s1 - *s2;
if (res != 0)
return res;
if (*s1 == '\0')
return 0;
++s1, ++s2;
--n;
}
return res;
}
void *memmove(void *dest, const void *src, ulong n)
{
long i;
char *d = (char *)dest, *s = (char *)src;
/* If src == dest do nothing */
if (dest < src) {
for(i = 0; i < n; i++) {
d[i] = s[i];
}
}
else if (dest > src) {
for(i = n -1; i >= 0; i--) {
d[i] = s[i];
}
}
return dest;
}
char toupper(char c)
{
if (c >= 'a' && c <= 'z')
return c + 'A' -'a';
else
return c;
}
int isdigit(char c)
{
return c >= '0' && c <= '9';
}
int isxdigit(char c)
{
return isdigit(c) || (toupper(c) >= 'A' && toupper(c) <= 'F'); }
unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) {
unsigned long result = 0, value;
if (!base) {
base = 10;
if (*cp == '0') {
base = 8;
cp++;
if (toupper(*cp) == 'X' && isxdigit(cp[1])) {
cp++;
base = 16;
}
}
} else if (base == 16) {
if (cp[0] == '0' && toupper(cp[1]) == 'X')
cp += 2;
}
while (isxdigit(*cp) &&
(value = isdigit(*cp) ? *cp-'0' : toupper(*cp)-'A'+10) < base) {
result = result*base + value;
cp++;
}
if (endp)
*endp = (char *)cp;
return result;
}
/*
* Scroll the error message area of the screen as needed
* Starts at line LINE_SCROLL and ends at line 23
*/
void scroll(void)
{
int i, j;
char *s, tmp;
/* Only scroll if at the bottom of the screen */
if (v->msg_line < 23) {
v->msg_line++;
} else {
/* If scroll lock is on, loop till it is cleared */
while (slock) {
check_input();
}
for (i=LINE_SCROLL; i<23; i++) {
s = (char *)(SCREEN_ADR + ((i+1) * 160));
for (j=0; j<160; j+=2, s+=2) {
*(s-160) = *s;
tmp = get_scrn_buf(i+1, j/2);
set_scrn_buf(i, j/2, tmp);
}
}
/* Clear the newly opened line */
s = (char *)(SCREEN_ADR + (23 * 160));
for (j=0; j<80; j++) {
*s = ' ';
set_scrn_buf(23, j, ' ');
s += 2;
}
tty_print_region(LINE_SCROLL, 0, 23, 79);
}
}
/*
* Clear scroll region
*/
void clear_scroll(void)
{
int i;
char *s;
s = (char*)(SCREEN_ADR+LINE_HEADER*160);
for(i=0; i<80*(24-LINE_HEADER); i++) {
*s++ = ' ';
*s++ = 0x17;
}
}
/*
* Place a single character on screen
*/
void cplace(int y, int x, const char c)
{
char *dptr;
dptr = (char *)(SCREEN_ADR + (160*y) + (2*x));
*dptr = c;
}
/*
* Print characters on screen
*/
void cprint(int y, int x, const char *text)
{
register int i;
char *dptr;
dptr = (char *)(SCREEN_ADR + (160*y) + (2*x));
for (i=0; text[i]; i++) {
*dptr = text[i];
dptr += 2;
}
tty_print_line(y, x, text);
}
void itoa(char s[], int n)
{
int i, sign;
if((sign = n) < 0)
n = -n;
i=0;
do {
s[i++] = n % 10 + '0';
} while ((n /= 10) > 0);
if(sign < 0)
s[i++] = '-';
s[i] = '\0';
reverse(s);
}
void reverse(char s[])
{
int c, i, j;
for(j = 0; s[j] != 0; j++)
;
for(i=0, j = j - 1; i < j; i++, j--) {
c = s[i];
s[i] = s[j];
s[j] = c;
}
}
void memcpy (void *dst, void *src, int len)
{
char *s = (char*)src;
char *d = (char*)dst;
int i;
if (len <= 0) {
return;
}
for (i = 0 ; i < len; i++) {
*d++ = *s++;
}
}
/*
* Print a people friendly address
*/
void aprint(int y, int x, ulong page)
{
/* page is in multiples of 4K */
if ((page << 2) < 9999) {
dprint(y, x, page << 2, 4, 0);
cprint(y, x+4, "K");
}
else if ((page >>8) < 9999) {
dprint(y, x, (page + (1 << 7)) >> 8, 4, 0);
cprint(y, x+4, "M");
}
else if ((page >>18) < 9999) {
dprint(y, x, (page + (1 << 17)) >> 18, 4, 0);
cprint(y, x+4, "G");
}
else {
dprint(y, x, (page + (1 << 27)) >> 28, 4, 0);
cprint(y, x+4, "T");
}
}
/*
* Print a decimal number on screen
*/
void dprint(int y, int x, ulong val, int len, int right)
{
ulong j, k;
int i, flag=0;
char buf[18];
if (val > 999999999 || len > 9) {
return;
}
for(i=0, j=1; i<len-1; i++) {
j *= 10;
}
if (!right) {
for (i=0; j>0; j/=10) {
k = val/j;
if (k > 9) {
j *= 100;
continue;
}
if (flag || k || j == 1) {
buf[i++] = k + '0';
flag++;
} else {
buf[i++] = ' ';
}
val -= k * j;
}
} else {
for(i=0; i<len; j/=10) {
if (j) {
k = val/j;
if (k > 9) {
j *= 100;
len++;
continue;
}
if (k == 0 && flag == 0) {
continue;
}
buf[i++] = k + '0';
val -= k * j;
} else {
if (flag == 0 && i < len-1) {
buf[i++] = '0';
} else {
buf[i++] = ' ';
}
}
flag++;
}
}
buf[i] = 0;
cprint(y,x,buf);
}
/* print double precision value */
void dpprint(int y, int x, double value, int decimals) {
int im = 0, il = 0, jm = 0, jl = 0, i = 0;
int digits_most[32] = {0}, digits_least[32] = {0};
char buf[64] = {0};
int buf_ptr = 0;
// Handle negative values
if (value < 0) {
value *= -1;
buf[buf_ptr] = '-';
buf_ptr++;
}
uint64_t a = value;
// Handle zero integer part
if (a == 0) {
buf[buf_ptr] = '0';
buf_ptr++;
}
else {
// Handle integer part
// most significant part
uint32_t m = a >> 32;
for(; m != 0; m/=10) {
digits_most[im] = m%10;
im++;
}
// least significant part
uint32_t l = a & 0xffffffff;
for(; l != 0; l/=10) {
digits_least[il] = l%10;
il++;
}
// fill buffer
for(jm = im-1; jm != -1; jm--) {
buf[buf_ptr] = '0'+digits_most[jm];
buf_ptr++;
}
for(jl = il-1; jl != -1; jl--) {
buf[buf_ptr] = '0'+digits_least[jl];
buf_ptr++;
}
}
buf[buf_ptr] = '.';
buf_ptr++;
// Handle floating part
double b = value - (uint64_t)value;
// fill buffer
for(i = 0; i < decimals; i++) {
buf[buf_ptr] = '0' + ((int)(b * (10 ^ i))) % 10;
buf_ptr++;
}
// end of line
buf[buf_ptr] = 0;
cprint(y, x, buf);
}
/*
* Print a hex number on screen at least digits long
*/
void hprint2(int y,int x, unsigned long val, int digits)
{
unsigned long j;
int i, idx, flag = 0;
char buf[18];
for (i=0, idx=0; i<8; i++) {
j = val >> (28 - (4 * i));
j &= 0xf;
if (j < 10) {
if (flag || j || i == 7) {
buf[idx++] = j + '0';
flag++;
} else {
buf[idx++] = '0';
}
} else {
buf[idx++] = j + 'a' - 10;
flag++;
}
}
if (digits > 8) {
digits = 8;
}
if (flag > digits) {
digits = flag;
}
buf[idx] = 0;
cprint(y,x,buf + (idx - digits));
}
/*
* Print a hex number on screen exactly digits long
*/
void hprint3(int y,int x, unsigned long val, int digits)
{
unsigned long j;
int i, idx, flag = 0;
char buf[18];
for (i=0, idx=0; i<digits; i++) {
j = 0xf & val;
val /= 16;
if (j < 10) {
if (flag || j || i == 7) {
buf[digits - ++idx] = j + '0';
flag++;
} else {
buf[digits - ++idx] = '0';
}
} else {
buf[digits - ++idx] = j + 'a' - 10;
flag++;
}
}
buf[idx] = 0;
cprint(y,x,buf);
}
/*
* Print a hex number on screen
*/
void hprint(int y, int x, unsigned long val)
{
return hprint2(y, x, val, 8);
}
/*
* Print an address in 0000m0000k0000 notation
*/
void xprint(int y,int x, ulong val)
{
ulong j;
j = (val & 0xffc00000) >> 20;
dprint(y, x, j, 4, 0);
cprint(y, x+4, "m");
j = (val & 0xffc00) >> 10;
dprint(y, x+5, j, 4, 0);
cprint(y, x+9, "k");
j = val & 0x3ff;
dprint(y, x+10, j, 4, 0);
}
char *codes[] = {
" Divide",
" Debug",
" NMI",
" Brkpnt",
"Overflow",
" Bound",
" Inv_Op",
" No_Math",
"Double_Fault",
"Seg_Over",
" Inv_TSS",
" Seg_NP",
"Stack_Fault",
"Gen_Prot",
"Page_Fault",
" Resvd",
" FPE",
"Alignment",
" Mch_Chk",
"SIMD FPE"
};
struct eregs {
ulong ss;
ulong ds;
ulong esp;
ulong ebp;
ulong esi;
ulong edi;
ulong edx;
ulong ecx;
ulong ebx;
ulong eax;
ulong vect;
ulong code;
ulong eip;
ulong cs;
ulong eflag;
};
/* Handle an interrupt */
void inter(struct eregs *trap_regs)
{
int i, line;
unsigned char *pp;
ulong address = 0;
int my_cpu_num = smp_my_cpu_num();
/* Get the page fault address */
if (trap_regs->vect == 14) {
__asm__("movl %%cr2,%0":"=r" (address));
}
#ifdef PARITY_MEM
/* Check for a parity error */
if (trap_regs->vect == 2) {
parity_err(trap_regs->edi, trap_regs->esi);
return;
}
#endif
/* clear scrolling region */
pp=(unsigned char *)(SCREEN_ADR+(2*80*(LINE_SCROLL-2)));
for(i=0; i<2*80*(24-LINE_SCROLL-2); i++, pp+=2) {
*pp = ' ';
}
line = LINE_SCROLL-2;
cprint(line, 0, "Unexpected Interrupt - Halting CPU");
dprint(line, COL_MID + 4, my_cpu_num, 2, 1);
cprint(line+2, 0, " Type: ");
if (trap_regs->vect <= 19) {
cprint(line+2, 7, codes[trap_regs->vect]);
} else {
hprint(line+2, 7, trap_regs->vect);
}
cprint(line+3, 0, " PC: ");
hprint(line+3, 7, trap_regs->eip);
cprint(line+4, 0, " CS: ");
hprint(line+4, 7, trap_regs->cs);
cprint(line+5, 0, "Eflag: ");
hprint(line+5, 7, trap_regs->eflag);
cprint(line+6, 0, " Code: ");
hprint(line+6, 7, trap_regs->code);
cprint(line+7, 0, " DS: ");
hprint(line+7, 7, trap_regs->ds);
cprint(line+8, 0, " SS: ");
hprint(line+8, 7, trap_regs->ss);
if (trap_regs->vect == 14) {
/* Page fault address */
cprint(line+7, 0, " Addr: ");
hprint(line+7, 7, address);
}
cprint(line+2, 20, "eax: ");
hprint(line+2, 25, trap_regs->eax);
cprint(line+3, 20, "ebx: ");
hprint(line+3, 25, trap_regs->ebx);
cprint(line+4, 20, "ecx: ");
hprint(line+4, 25, trap_regs->ecx);
cprint(line+5, 20, "edx: ");
hprint(line+5, 25, trap_regs->edx);
cprint(line+6, 20, "edi: ");
hprint(line+6, 25, trap_regs->edi);
cprint(line+7, 20, "esi: ");
hprint(line+7, 25, trap_regs->esi);
cprint(line+8, 20, "ebp: ");
hprint(line+8, 25, trap_regs->ebp);
cprint(line+9, 20, "esp: ");
hprint(line+9, 25, trap_regs->esp);
cprint(line+1, 38, "Stack:");
for (i=0; i<10; i++) {
hprint(line+2+i, 38, trap_regs->esp+(4*i));
hprint(line+2+i, 47, *(ulong*)(trap_regs->esp+(4*i)));
hprint(line+2+i, 57, trap_regs->esp+(4*(i+10)));
hprint(line+2+i, 66, *(ulong*)(trap_regs->esp+(4*(i+10))));
}
cprint(line+11, 0, "CS:EIP: ");
pp = (unsigned char *)trap_regs->eip;
for(i = 0; i < 9; i++) {
hprint2(line+11, 8+(3*i), pp[i], 2);
}
while(1) {
check_input();
}
}
void set_cache(int val)
{
switch(val) {
case 0:
cache_off();
break;
case 1:
cache_on();
break;
}
}
int get_key() {
int c;
c = inb(0x64);
if (c & 0x01) {
c = inb(0x60);
return((c));
} else if (serial_cons) {
int comstat;
comstat = serial_echo_inb(UART_LSR);
if (comstat & UART_LSR_DR) {
c = serial_echo_inb(UART_RX);
/* Pressing '.' has same effect as 'c'
on a keyboard.
Oct 056 Dec 46 Hex 2E Ascii .
*/
return (ascii_to_keycode(c));
}
}
return(0);
}
void check_input(void)
{
unsigned char c;
if ((c = get_key())) {
switch(c & 0x7f) {
case 1:
/* "ESC" key was pressed, bail out. */
cprint(LINE_RANGE, COL_MID+23, "Halting... ");
reboot();
break;
case 46:
/* c - Configure */
get_config();
break;
case 28:
/* CR - clear scroll lock */
slock = 0;
footer();
break;
case 57:
/* SP - set scroll lock */
slock = 1;
footer();
break;
case 0x26:
/* ^L/L - redraw the display */
if (serial_cons) {
tty_print_screen();
} else {
clear_screen_buf();
tty_print_region(0, 0, 80, 100);
}
break;
}
}
}
void footer()
{
cprint(24, 0, "(ESC)exit (c)configuration (SP)scroll_lock (CR)scroll_unlock");
if (slock) {
cprint(24, 74, "Locked");
} else {
cprint(24, 74, " ");
}
}
ulong getval(int x, int y, int result_shift)
{
unsigned long val;
int done;
int c;
int i, n;
int base;
int shift;
char buf[16];
for(i = 0; i < sizeof(buf)/sizeof(buf[0]); i++ ) {
buf[i] = ' ';
}
buf[sizeof(buf)/sizeof(buf[0]) -1] = '\0';
wait_keyup();
done = 0;
n = 0;
base = 10;
while(!done) {
/* Read a new character and process it */
c = get_key();
switch(c) {
case 0x26: /* ^L/L - redraw the display */
tty_print_screen();
break;
case 0x1c: /* CR */
/* If something has been entered we are done */
if(n) done = 1;
break;
case 0x19: /* p */ buf[n] = 'p'; break;
case 0x22: /* g */ buf[n] = 'g'; break;
case 0x32: /* m */ buf[n] = 'm'; break;
case 0x25: /* k */ buf[n] = 'k'; break;
case 0x2d: /* x */
/* Only allow 'x' after an initial 0 */
if (n == 1 && (buf[0] == '0')) {
buf[n] = 'x';
}
break;
case 0x0e: /* BS */
if (n > 0) {
n -= 1;
buf[n] = ' ';
}
break;
/* Don't allow entering a number not in our current base */
case 0x0B: if (base >= 1) buf[n] = '0'; break;
case 0x02: if (base >= 2) buf[n] = '1'; break;
case 0x03: if (base >= 3) buf[n] = '2'; break;
case 0x04: if (base >= 4) buf[n] = '3'; break;
case 0x05: if (base >= 5) buf[n] = '4'; break;
case 0x06: if (base >= 6) buf[n] = '5'; break;
case 0x07: if (base >= 7) buf[n] = '6'; break;
case 0x08: if (base >= 8) buf[n] = '7'; break;
case 0x09: if (base >= 9) buf[n] = '8'; break;
case 0x0A: if (base >= 10) buf[n] = '9'; break;
case 0x1e: if (base >= 11) buf[n] = 'a'; break;
case 0x30: if (base >= 12) buf[n] = 'b'; break;
case 0x2e: if (base >= 13) buf[n] = 'c'; break;
case 0x20: if (base >= 14) buf[n] = 'd'; break;
case 0x12: if (base >= 15) buf[n] = 'e'; break;
case 0x21: if (base >= 16) buf[n] = 'f'; break;
default:
break;
}
/* Don't allow anything to be entered after a suffix */
if (n > 0 && (
(buf[n-1] == 'p') || (buf[n-1] == 'g') ||
(buf[n-1] == 'm') || (buf[n-1] == 'k'))) {
buf[n] = ' ';
}
/* If we have entered a character increment n */
if (buf[n] != ' ') {
n++;
}
buf[n] = ' ';
/* Print the current number */
cprint(x, y, buf);
/* Find the base we are entering numbers in */
base = 10;
if ((buf[0] == '0') && (buf[1] == 'x')) {
base = 16;
}
else if (buf[0] == '0') {
base = 8;
}
}
/* Compute our current shift */
shift = 0;
switch(buf[n-1]) {
case 'g': /* gig */ shift = 30; break;
case 'm': /* meg */ shift = 20; break;
case 'p': /* page */ shift = 12; break;
case 'k': /* kilo */ shift = 10; break;
}
shift -= result_shift;
/* Compute our current value */
val = simple_strtoul(buf, 0, base);
if (shift > 0) {
if (shift >= 32) {
val = 0xffffffff;
} else {
val <<= shift;
}
} else {
if (-shift >= 32) {
val = 0;
}
else {
val >>= -shift;
}
}
return val;
}
void ttyprint(int y, int x, const char *p)
{
static char sx[3];
static char sy[3];
sx[0]='\0';
sy[0]='\0';
x++; y++;
itoa(sx, x);
itoa(sy, y);
if (!conservative_smp || (conservative_smp && mstr_cpu == smp_my_ord_num(smp_my_cpu_num()))) {
serial_echo_print("[");
serial_echo_print(sy);
serial_echo_print(";");
serial_echo_print(sx);
serial_echo_print("H");
serial_echo_print(p);
}
}
void serial_echo_init(void)
{
int comstat, hi, lo, serial_div;
unsigned char lcr;
/* read the Divisor Latch */
comstat = serial_echo_inb(UART_LCR);
serial_echo_outb(comstat | UART_LCR_DLAB, UART_LCR);
hi = serial_echo_inb(UART_DLM);
lo = serial_echo_inb(UART_DLL);
serial_echo_outb(comstat, UART_LCR);
/* now do hardwired init */
lcr = serial_parity | (serial_bits - 5);
serial_echo_outb(lcr, UART_LCR); /* No parity, 8 data bits, 1 stop */
serial_div = 115200 / serial_baud_rate;
serial_echo_outb(0x80|lcr, UART_LCR); /* Access divisor latch */
serial_echo_outb(serial_div & 0xff, UART_DLL); /* baud rate divisor */
serial_echo_outb((serial_div >> 8) & 0xff, UART_DLM);
serial_echo_outb(lcr, UART_LCR); /* Done with divisor */
/* Prior to disabling interrupts, read the LSR and RBR
* registers */
comstat = serial_echo_inb(UART_LSR); /* COM? LSR */
comstat = serial_echo_inb(UART_RX); /* COM? RBR */
serial_echo_outb(0x00, UART_IER); /* Disable all interrupts */
clear_screen_buf();
return;
}
/*
* Get_number of digits
*/
int getnum(ulong val)
{
int len = 0;
int i = 1;
while(i <= val)
{
len++;
i *= 10;
}
return len;
}
void serial_echo_print(const char *p)
{
if (!serial_cons) {
return;
}
/* Now, do each character */
while (*p) {
WAIT_FOR_XMITR;
/* Send the character out. */
serial_echo_outb(*p, UART_TX);
if(*p==10) {
WAIT_FOR_XMITR;
serial_echo_outb(13, UART_TX);
}
p++;
}
}
/* Except for multi-character key sequences this mapping
* table is complete. So it should not need to be updated
* when new keys are searched for. However the key handling
* should really be turned around and only in get_key should
* we worry about the exact keycode that was pressed. Everywhere
* else we should switch on the character...
*/
struct ascii_map_str ser_map[] =
/*ascii keycode ascii keycode*/
{
/* Special cases come first so I can leave
* their ``normal'' mapping in the table,
* without it being activated.
*/
{ 27, 0x01}, /* ^[/ESC -> ESC */
{ 127, 0x0e}, /* DEL -> BS */
{ 8, 0x0e}, /* ^H/BS -> BS */
{ 10, 0x1c}, /* ^L/NL -> CR */
{ 13, 0x1c}, /* ^M/CR -> CR */
{ 9, 0x0f}, /* ^I/TAB -> TAB */
{ 19, 0x39}, /* ^S -> SP */
{ 17, 28}, /* ^Q -> CR */
{ ' ', 0x39}, /* SP -> SP */
{ 'a', 0x1e},
{ 'A', 0x1e},
{ 1, 0x1e}, /* ^A -> A */
{ 'b', 0x30},
{ 'B', 0x30},
{ 2, 0x30}, /* ^B -> B */
{ 'c', 0x2e},
{ 'C', 0x2e},
{ 3, 0x2e}, /* ^C -> C */
{ 'd', 0x20},
{ 'D', 0x20},
{ 4, 0x20}, /* ^D -> D */
{ 'e', 0x12},
{ 'E', 0x12},
{ 5, 0x12}, /* ^E -> E */
{ 'f', 0x21},
{ 'F', 0x21},
{ 6, 0x21}, /* ^F -> F */
{ 'g', 0x22},
{ 'G', 0x22},
{ 7, 0x22}, /* ^G -> G */
{ 'h', 0x23},
{ 'H', 0x23},
{ 8, 0x23}, /* ^H -> H */
{ 'i', 0x17},
{ 'I', 0x17},
{ 9, 0x17}, /* ^I -> I */
{ 'j', 0x24},
{ 'J', 0x24},
{ 10, 0x24}, /* ^J -> J */