mirrors/Astral
1
0
Fork 0
mirror of https://github.com/Mathewnd/Astral.git synced 2026-10-27 20:58:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

kernel: do preparation work for copyless read/write

Browse Source
This commit is contained in:
Matheus
2024-09-18 21:17:37 -03:00
parent 1140244816
commit 611f13b562
12 changed files with 134 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel-src/arch/x86-64/e9.c
+11 -2
View File
@@ -1,6 +1,7 @@
#include <arch/io.h>
#include <kernel/devfs.h>
#include <logging.h>
#include <kernel/usercopy.h>
void arch_e9_putc(char c) {
#ifdef X86_64_ENABLE_E9
@@ -16,11 +17,18 @@ void arch_e9_puts(char *c) {
#endif
}
#ifdef X86_64_ENABLE_E9
static int devwrite(int minor, void *bufferp, size_t count, uintmax_t offset, int flags, size_t *wcount) {
uint8_t *buffer = bufferp;
for (uintmax_t i = 0; i < count; ++i)
outb(0xe9, buffer[i]);
for (uintmax_t i = 0; i < count; ++i) {
char c;
int error = USERCOPY_POSSIBLY_FROM_USER(&c, &buffer[i], 1);
if (error)
return error;
outb(0xe9, c);
}
*wcount = count;
return 0;
@@ -29,6 +37,7 @@ static int devwrite(int minor, void *bufferp, size_t count, uintmax_t offset, in
static devops_t devops = {
.write = devwrite
};
#endif
void arch_e9_initdev() {
#ifdef X86_64_ENABLE_E9