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#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#define MAXCONF 64
static char *confname[MAXCONF];
static char *confval[MAXCONF];
static int nconf;
/* screen.c */
extern char* rgbmask2chan(char *buf, int depth, u32int rm, u32int gm, u32int bm);
/* vgavesa.c */
extern char* vesabootscreenconf(char*, char*, uchar*);
static void
multibootargs(void)
{
extern ulong multibootptr;
ulong *multiboot;
char *cp, *ep, *s;
ulong *m, l;
int i, n;
if(multibootptr == 0 || multibootptr >= MemMin)
return;
multiboot = (ulong*)KADDR(multibootptr);
cp = BOOTARGS;
ep = cp + BOOTARGSLEN-1;
/* memory map */
if((multiboot[0] & (1<<6)) != 0 && (l = multiboot[11]) >= 24){
cp = seprint(cp, ep, "*e820=");
m = KADDR(multiboot[12]);
while(m[0] >= 20 && m[0]+4 <= l){
uvlong base, size;
m++;
base = ((uvlong)m[0] | (uvlong)m[1]<<32);
size = ((uvlong)m[2] | (uvlong)m[3]<<32);
cp = seprint(cp, ep, "%.1lux %.16llux %.16llux ",
m[4] & 0xF, base, base+size);
l -= m[-1]+4;
m = (ulong*)((uintptr)m + m[-1]);
}
cp[-1] = '\n';
}
if((multiboot[0] & (1<<12)) != 0 && multiboot[22] != 0){ /* framebuffer */
uchar *p = (uchar*)multiboot + 112;
int depth = multiboot[27] & 0xFF;
char chan[32];
switch((multiboot[27]>>8) & 0xFF){
case 0:
snprint(chan, sizeof chan, "m%d", depth);
if(0){
case 1:
rgbmask2chan(chan, depth,
(1UL<<p[1])-1 << p[0],
(1UL<<p[3])-1 << p[2],
(1UL<<p[5])-1 << p[4]);
}
cp = seprint(cp, ep, "*bootscreen=%dx%dx%d %s %#llux\n",
(int)multiboot[24]*8 / depth,
(int)multiboot[26],
depth,
chan,
(uvlong)multiboot[23]<<32 | multiboot[22]);
}
} else
if((multiboot[0] & (1<<11)) != 0 && multiboot[19] != 0) /* vbe mode info */
cp = vesabootscreenconf(cp, ep, KADDR(multiboot[19]));
/* plan9.ini passed as the first module */
if((multiboot[0] & (1<<3)) != 0 && multiboot[5] > 0 && multiboot[6] != 0){
m = KADDR(multiboot[6]);
s = (char*)KADDR(m[0]);
if(m[1] > m[0]){
n = utfnlen(s, m[1] - m[0]);
if(n > 0)
cp = seprint(cp, ep, "%.*s\n", n, s);
}
}
/* command line */
if((multiboot[0] & (1<<2)) != 0 && multiboot[4] != 0){
n = tokenize(KADDR(multiboot[4]), confval, MAXCONF);
for(i=0; i<n; i++)
cp = seprint(cp, ep, "%s\n", confval[i]);
}
*cp = 0;
}
void
bootargsinit(void)
{
int i, j, n;
char *cp, *line[MAXCONF], *p, *q;
multibootargs();
/*
* parse configuration args from dos file plan9.ini
*/
cp = BOOTARGS; /* where b.com leaves its config */
cp[BOOTARGSLEN-1] = 0;
/*
* Strip out '\r', change '\t' -> ' '.
*/
p = cp;
for(q = cp; *q; q++){
if(*q == '\r')
continue;
if(*q == '\t')
*q = ' ';
*p++ = *q;
}
*p = 0;
n = getfields(cp, line, MAXCONF, 1, "\n");
for(i = 0; i < n; i++){
if(*line[i] == '#')
continue;
cp = strchr(line[i], '=');
if(cp == nil)
continue;
*cp++ = '\0';
for(j = 0; j < nconf; j++){
if(cistrcmp(confname[j], line[i]) == 0)
break;
}
confname[j] = line[i];
confval[j] = cp;
if(j == nconf)
nconf++;
}
}
char*
getconf(char *name)
{
int i;
for(i = 0; i < nconf; i++)
if(cistrcmp(confname[i], name) == 0)
return confval[i];
return 0;
}
void
setconfenv(void)
{
int i;
for(i = 0; i < nconf; i++){
if(confname[i][0] != '*')
ksetenv(confname[i], confval[i], 0);
ksetenv(confname[i], confval[i], 1);
}
}
void
writeconf(void)
{
char *p, *q;
int n;
p = getconfenv();
if(waserror()) {
free(p);
nexterror();
}
/* convert to name=value\n format */
for(q=p; *q; q++) {
q += strlen(q);
*q = '=';
q += strlen(q);
*q = '\n';
}
n = q - p + 1;
if(n >= BOOTARGSLEN)
error("kernel configuration too large");
memmove(BOOTARGS, p, n);
memset(BOOTLINE, 0, BOOTLINELEN);
poperror();
free(p);
}
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