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Basic VM and other minor improvements.

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Not complete, probably not fully debugged or optimized.
This commit is contained in:
Ben Gras
2008-11-19 12:26:10 +00:00
parent c888305e21
commit c078ec0331
273 changed files with 10814 additions and 4305 deletions
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47
boot/bootimage.c
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@@ -18,6 +18,8 @@
#include <minix/const.h>
#include <minix/type.h>
#include <minix/syslib.h>
#include <minix/tty.h>
#include <sys/video.h>
#include <kernel/const.h>
#include <kernel/type.h>
#include <ibm/partition.h>
@@ -27,6 +29,10 @@
static int block_size = 0;
extern u16_t vid_port; /* Video i/o port. */
extern u32_t vid_mem_base; /* Video memory base address. */
extern u32_t vid_mem_size; /* Video memory size. */
#define click_shift clck_shft /* 7 char clash with click_size. */
/* Some kernels have extra features: */
@@ -376,6 +382,42 @@ int get_segment(u32_t *vsec, long *size, u32_t *addr, u32_t limit)
return 1;
}
static void restore_screen(void)
{
struct boot_tty_info boot_tty_info;
u32_t info_location;
#define LINES 25
#define CHARS 80
static u16_t consolescreen[LINES][CHARS];
/* Try and find out what the main console was displaying
* by looking into video memory.
*/
info_location = vid_mem_base+vid_mem_size-sizeof(boot_tty_info);
raw_copy(mon2abs(&boot_tty_info), info_location,
sizeof(boot_tty_info));
if(boot_tty_info.magic == TTYMAGIC) {
if(boot_tty_info.flags & (BTIF_CONSORIGIN|BTIF_CONSCURSOR) ==
(BTIF_CONSORIGIN|BTIF_CONSCURSOR)) {
int line;
raw_copy(mon2abs(consolescreen),
vid_mem_base + boot_tty_info.consorigin,
sizeof(consolescreen));
clear_screen();
for(line = 0; line < LINES; line++) {
int ch;
for(ch = 0; ch < CHARS; ch++) {
u16_t newch = consolescreen[line][ch] & BYTE;
if(newch < ' ') newch = ' ';
putch(newch);
}
}
}
}
}
void exec_image(char *image)
/* Get a Minix image into core, patch it up and execute. */
{
@@ -607,8 +649,13 @@ void exec_image(char *image)
/* Read leftover character, if any. */
scan_keyboard();
/* Restore screen contents. */
restore_screen();
}
ino_t latest_version(char *version, struct stat *stp)
/* Recursively read the current directory, selecting the newest image on
* the way up. (One can't use r_stat while reading a directory.)