From 0d2dfeca9318e954cbbd1f719b65f8a5c5eacd38 Mon Sep 17 00:00:00 2001
From: Hunter Kvalevog <hunter@kvog.sh>
Date: Sun, 15 Feb 2026 09:59:38 -0600
Subject: rl: New build system, arm64 support

---
 rushmore-linux/rlwsd/rlwsd.c | 124 -------------------------------------------
 1 file changed, 124 deletions(-)
 delete mode 100644 rushmore-linux/rlwsd/rlwsd.c

(limited to 'rushmore-linux/rlwsd/rlwsd.c')

diff --git a/rushmore-linux/rlwsd/rlwsd.c b/rushmore-linux/rlwsd/rlwsd.c
deleted file mode 100644
index 548dc9a..0000000
--- a/rushmore-linux/rlwsd/rlwsd.c
+++ /dev/null
@@ -1,124 +0,0 @@
-#include <errno.h>
-#include <fcntl.h>
-#include <linux/fb.h>
-#include <linux/kd.h>
-#include <stdarg.h>
-#include <string.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <sys/mman.h>
-#include <sys/ioctl.h>
-#include <sys/uio.h>
-#include <time.h>
-#include <unistd.h>
-
-static const char* tmp_fmt(const char* fmt, ...)
-{
-    static char msg[1024] = { 0 };
-    va_list va; va_start(va, fmt);
-    vsnprintf(msg, sizeof(msg), fmt, va);
-    va_end(va);
-    return msg;
-}
-
-static void spew(const char* message)
-{
-    // Kernel log is available after init
-    int kmfd = open("/dev/kmsg", O_WRONLY | O_CLOEXEC);
-
-    struct iovec msgvec[] = {
-#define STRVEC(str) { .iov_base = (void*)(str), .iov_len = __builtin_strlen(str) }
-        STRVEC("rlwsd: "),
-        STRVEC(message),
-        STRVEC("\n")
-#undef STRVEC
-    };
-    writev(kmfd, msgvec, sizeof(msgvec) / sizeof(*msgvec));
-
-    close(kmfd);
-}
-
-static void panic(const char* message)
-{
-    spew(message);
-    _exit(1); // Triggers a kernel panic since we're PID 1
-}
-
-int main(void)
-{
-    int fd = open("/dev/fb0", O_RDWR | O_CLOEXEC);
-    if (fd < 0) {
-        panic(tmp_fmt("Failed to open /dev/fb0: %s", strerror(errno)));
-    }
-
-    struct fb_fix_screeninfo finfo;
-    struct fb_var_screeninfo vinfo;
-    if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) != 0) {
-        panic(tmp_fmt("FBIOGET_FSCREENINFO: %s", strerror(errno)));
-    }
-    if (ioctl(fd, FBIOGET_VSCREENINFO, &vinfo) != 0) {
-        panic(tmp_fmt("FBIOGET_VSCREENINFO: %s", strerror(errno)));
-    }
-
-    spew(tmp_fmt("fb0: %ux%u bpp=%u line_length=%u visual=%u",
-        vinfo.xres, vinfo.yres, vinfo.bits_per_pixel,
-        finfo.line_length, finfo.visual));
-    spew(tmp_fmt("fb0: R %u/%u G %u/%u B %u/%u",
-        vinfo.red.offset, vinfo.red.length,
-        vinfo.green.offset, vinfo.green.length,
-        vinfo.blue.offset, vinfo.blue.length));
-
-    if (vinfo.bits_per_pixel != 24) {
-        panic("BPP must be 24");
-    }
-
-    // Disable TTY
-    int tty = open("/dev/tty0", O_RDWR);
-    if (tty < 0) {
-        tty = open("/dev/console", O_RDWR);
-        if (tty < 0) {
-            panic(tmp_fmt("Couldn't open tty: %s", strerror(errno)));
-        }
-    }
-    if (ioctl(tty, KDSETMODE, KD_GRAPHICS) != 0) {
-        panic(tmp_fmt("Failed to set tty mode to KD_GRAPHICS: %s", strerror(errno)));
-    }
-    close(tty);
-
-    size_t fb_size = (size_t)finfo.line_length * vinfo.yres;
-    uint8_t* fb = (uint8_t*)mmap(NULL, fb_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-    if (fb == MAP_FAILED) {
-        panic(tmp_fmt("mmap failed: %s", strerror(errno)));
-    }
-
-#if 1
-    for (uint32_t y = 0; y < vinfo.yres; ++y) {
-        uint8_t* row = fb + (size_t)y * finfo.line_length;
-        memset(row, 0x00, finfo.line_length);
-    }
-#endif
-
-    uint8_t lum = 0;
-    uint32_t y = 0;
-    float then = 0.0f;
-
-    for (;;)
-    {
-        struct timespec ts;
-        clock_gettime(CLOCK_MONOTONIC, &ts);
-        float now = ts.tv_sec + (ts.tv_nsec / 1e9f);
-        if ((now - then) >= (1.0f / 60.0f)) {
-            then = now;
-
-            uint32_t color = (uint32_t)lum << 24 | (uint32_t)lum << 16 | (uint32_t)lum << 8 | lum;
-            uint8_t* row = fb + (size_t)y * finfo.line_length;
-            for (size_t x = 0; x < vinfo.xres; ++x) {
-                size_t bpp = vinfo.bits_per_pixel / 8;
-                memcpy(&row[(x * bpp) + x], &color, 4);
-            }
-
-            lum = (lum + 7) % 255;
-            y = (y + 1) % (vinfo.yres - 1);
-        }
-    }
-}
-- 
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