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feat(ipc): implement synchronous Rendezvous IPC and multi-thread cooperative scheduler

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RarDog
2026-09-02 16:52:03 +03:00
parent 6cbd13b4aa
commit 448b0e710e
11 changed files with 712 additions and 97 deletions
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servers/uart_driver/main.c
+52 -6
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@@ -1,17 +1,63 @@
#include "uart.h"
#include "stdio.h"
#include "abi/syscalls.h"
#include "abi/ipc.h"
#define UART_SERVICE_ENDPOINT 2
extern void _start(void) {
uart_init(UART_COM1_PORT, 115200);
uart_puts(UART_COM1_PORT, "[RING3-UART-DRIVER] 16550 UART COM1 initialized from userspace!\n");
puts("[UART-DRIVER] 16550 UART Server started in Ring 3. Listening for IPC requests...");
uint64_t last_client = 0;
uint64_t reply_val0 = 0;
uint64_t reply_val1 = 0;
while (1) {
if (uart_has_data(UART_COM1_PORT)) {
char c = uart_getc(UART_COM1_PORT);
// Echo back
uart_putc(UART_COM1_PORT, c);
uint64_t sender_tid = 0;
uint64_t opcode = 0;
uint64_t arg0 = 0;
uint64_t arg1 = 0;
// Block and wait for next client IPC request, replying to last client if any
sysret_t ret = sys_ipc_reply_recv_raw(
UART_SERVICE_ENDPOINT,
last_client,
reply_val0,
reply_val1,
&sender_tid,
&opcode,
&arg0,
&arg1
);
if (ret == 0 && sender_tid != 0) {
last_client = sender_tid;
if (opcode == IPC_OP_WRITE) {
// Write received characters to UART hardware
char c0 = (char)(arg0 & 0xFF);
char c1 = (char)((arg0 >> 8) & 0xFF);
char c2 = (char)((arg0 >> 16) & 0xFF);
char c3 = (char)((arg0 >> 24) & 0xFF);
if (c0) uart_putc(UART_COM1_PORT, c0);
if (c1) uart_putc(UART_COM1_PORT, c1);
if (c2) uart_putc(UART_COM1_PORT, c2);
if (c3) uart_putc(UART_COM1_PORT, c3);
reply_val0 = 0; // Success
reply_val1 = 4; // Bytes written
} else if (opcode == IPC_OP_PING) {
reply_val0 = IPC_OP_PONG;
reply_val1 = arg0 + 1;
} else {
reply_val0 = (uint64_t)-1;
reply_val1 = 0;
}
} else {
last_client = 0;
sys_yield();
}
sys_yield();
}
}