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feat(shell): add reboot and poweroff commands #115

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Merged
im-nymii merged 3 commits into from
Jul 17, 2026
Merged

feat(shell): add reboot and poweroff commands #115

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bda0952
feat(shell): add reboot and poweroff commands
kudasaixc Jul 5, 2026
27addcf
feat(shell): update reboot and poweroff commands to exit functionality
im-nymii Jul 17, 2026
d796dd5
feat(shell): update poweroff command description to exit functionality
im-nymii Jul 17, 2026
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4 changes: 4 additions & 0 deletions src/include/io.h
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,10 @@ static inline void outb(uint16_t port, uint8_t value) {
__asm__ volatile ("outb %0, %1" : : "a"(value), "Nd"(port));
}

static inline void outw(uint16_t port, uint16_t value) {
__asm__ volatile ("outw %0, %1" : : "a"(value), "Nd"(port));
}

static inline uint8_t inb(uint16_t port) {
uint8_t ret;
__asm__ volatile ("inb %1, %0" : "=a"(ret) : "Nd"(port));
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16 changes: 16 additions & 0 deletions src/kernel/shell.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
#include "../include/colors.h"
#include "../include/fetch.h"
#include "../include/integer.h"
#include "../include/io.h"
#include "../include/log.h"
#include "../include/memory.h"
#include "../include/mm.h"
Expand Down Expand Up @@ -94,6 +95,8 @@ static void shell_execute(char *cmd) {
terminal_writestring("mmap - print current virtual memory mappings\n");
terminal_writestring("peek - read and print memory at a given hex address\n");
terminal_writestring("echo - repeats your input to the console\n");
terminal_writestring("reboot - restart the machine\n");
terminal_writestring("exit. - shut the machine down (QEMU/Bochs)\n");
terminal_writestring("crash - make the machine freeze (fun cmd)\n\n");
}
else if (strcmp(cmd_name, "clear") == 0) {
Expand Down Expand Up @@ -144,6 +147,19 @@ static void shell_execute(char *cmd) {
for (;;)
asm volatile("hlt");
}
else if (strcmp(cmd_name, "reboot") == 0) {
terminal_writestring("Rebooting...\n");
while (inb(0x64) & 0x02)
;
outb(0x64, 0xFE);
asm volatile("cli; hlt");
}
else if (strcmp(cmd_name, "exit") == 0) {
terminal_writestring("Powering off...\n");
outw(0x604, 0x2000);
outw(0xB004, 0x2000);
asm volatile("cli; hlt");
}
else if (strcmp(cmd_name, "uptime") == 0) {
uint32_t ticks = get_tick();
uint32_t total_seconds = ticks / 1000;
Expand Down
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