Change how config works a bit

CONFIG.md

@@ -23,20 +23,26 @@ Some *local assignments* are shared between entries using any *protocol*, while
 * `TIMEOUT` - Specifies the timeout in seconds before the first *entry* is automatically booted.
 
 *Locally assignable (non protocol specific)* keys are:
-* `KERNEL_DRIVE` - The BIOS drive (in decimal) where the kernel resides (if unspecified, boot drive is assumed).
-* `KERNEL_PARTITION` - The index (in decimal) of the partition containing the kernel.
-* `KERNEL_PATH` - The path of the kernel in said partition, forward slashes to delimit directories.
-* `KERNEL_PROTO` - The boot protocol that will be used to boot the kernel. Valid protocols are: `linux`, `stivale`.
-* `KERNEL_CMDLINE` - The command line string to be passed to the kernel.
+* `PROTOCOL` - The boot protocol that will be used to boot the kernel. Valid protocols are: `linux`, `stivale`.
+* `KERNEL_PROTO` - Alias of `PROTOCOL`.
+* `CMDLINE` - The command line string to be passed to the kernel. Can be omitted.
+* `KERNEL_CMDLINE` - Alias of `CMDLINE`.
 
 *Locally assignable (protocol specific)* keys are:
 * Linux protocol:
+  * `KERNEL_DRIVE` - The BIOS drive (in decimal) where the kernel resides (if unspecified, boot drive is assumed).
+  * `KERNEL_PARTITION` - The index (in decimal) of the partition containing the kernel.
+  * `KERNEL_PATH` - The path of the kernel in said partition, forward slashes to delimit directories.
   * `INITRD_PARTITION` - Partition index of the initial ramdisk.
   * `INITRD_PATH` - The path to the initial ramdisk.
 * stivale protocol:
+  * `KERNEL_DRIVE` - The BIOS drive (in decimal) where the kernel resides (if unspecified, boot drive is assumed).
+  * `KERNEL_PARTITION` - The index (in decimal) of the partition containing the kernel.
+  * `KERNEL_PATH` - The path of the kernel in said partition, forward slashes to delimit directories.
   * `MODULE_PARTITION` - Partition index of a module.
   * `MODULE_PATH` - The path to a module.
   * `MODULE_STRING` - A string to be passed to a module.
+
   Note that one can define these 3 variable multiple times to specify multiple modules.
   The entries will be matched in order. E.g.: the 1st partition entry will be matched
   to the 1st path and the 1st string entry that appear, and so on.

src/main.c

@@ -71,7 +71,9 @@ refresh:
                 config_set_entry(selected_entry);
                 text_enable_cursor();
                 if (!config_get_value(cmdline, 0, CMDLINE_MAX, "KERNEL_CMDLINE")) {
-                    cmdline[0] = '\0';
+                    if (!config_get_value(cmdline, 0, CMDLINE_MAX, "CMDLINE")) {
+                        cmdline[0] = '\0';
+                    }
                 }
                 text_clear();
                 return;
@@ -79,7 +81,9 @@ refresh:
                 config_set_entry(selected_entry);
                 text_enable_cursor();
                 if (!config_get_value(cmdline, 0, CMDLINE_MAX, "KERNEL_CMDLINE")) {
-                    cmdline[0] = '\0';
+                    if (!config_get_value(cmdline, 0, CMDLINE_MAX, "CMDLINE")) {
+                        cmdline[0] = '\0';
+                    }
                 }
                 print("\n\n> ");
                 gets(cmdline, cmdline, CMDLINE_MAX);
@@ -90,8 +94,6 @@ refresh:
 }
 
 void main(int boot_drive) {
-    struct file_handle f;
-
     // Initial prompt.
     init_vga_textmode();
 
@@ -121,14 +123,13 @@ void main(int boot_drive) {
         }
     }
 
-    int drive, part;
-    char path[128], proto[64], buf[32];
-
-    int timeout;
-    if (!config_get_value(buf, 0, 64, "TIMEOUT")) {
-        timeout = 5;
-    } else {
-        timeout = (int)strtoui(buf);
+    int timeout; {
+        char buf[32];
+        if (!config_get_value(buf, 0, 32, "TIMEOUT")) {
+            timeout = 5;
+        } else {
+            timeout = (int)strtoui(buf);
+        }
     }
 
     print("\n");
@@ -152,30 +153,17 @@ void main(int boot_drive) {
 got_entry:
     init_e820();
 
-    if (!config_get_value(buf, 0, 32, "KERNEL_DRIVE")) {
-        drive = boot_drive;
-    } else {
-        drive = (int)strtoui(buf);
-    }
-    if (!config_get_value(buf, 0, 32, "KERNEL_PARTITION")) {
-        panic("KERNEL_PARTITION not specified");
-    }
-    part = (int)strtoui(buf);
-    if (!config_get_value(path, 0, 128, "KERNEL_PATH")) {
-        panic("KERNEL_PATH not specified");
-    }
-    if (!config_get_value(proto, 0, 64, "KERNEL_PROTO")) {
-        panic("KERNEL_PROTO not specified");
-    }
-
-    if (fopen(&f, drive, part, path)) {
-        panic("Could not open kernel file");
+    char proto[32];
+    if (!config_get_value(proto, 0, 32, "KERNEL_PROTO")) {
+        if (!config_get_value(proto, 0, 32, "PROTOCOL")) {
+            panic("PROTOCOL not specified");
+        }
     }
 
     if (!strcmp(proto, "stivale")) {
-        stivale_load(&f, cmdline);
+        stivale_load(cmdline, boot_drive);
     } else if (!strcmp(proto, "linux")) {
-        linux_load(&f, cmdline);
+        linux_load(cmdline, boot_drive);
     } else {
         panic("Invalid protocol specified");
     }

src/protos/linux.c

@@ -10,7 +10,35 @@
 #define KERNEL_LOAD_ADDR ((size_t)0x100000)
 #define INITRD_LOAD_ADDR ((size_t)0x1000000)
 
-void linux_load(struct file_handle *fd, char *cmdline) {
+void linux_load(char *cmdline, int boot_drive) {
+    int kernel_drive; {
+        char buf[32];
+        if (!config_get_value(buf, 0, 32, "KERNEL_DRIVE")) {
+            kernel_drive = boot_drive;
+        } else {
+            kernel_drive = (int)strtoui(buf);
+        }
+    }
+
+    int kernel_part; {
+        char buf[32];
+        if (!config_get_value(buf, 0, 32, "KERNEL_PARTITION")) {
+            panic("KERNEL_PARTITION not specified");
+        } else {
+            kernel_part = (int)strtoui(buf);
+        }
+    }
+
+    char *kernel_path = balloc(128);
+    if (!config_get_value(kernel_path, 0, 128, "KERNEL_PATH")) {
+        panic("KERNEL_PATH not specified");
+    }
+
+    struct file_handle *fd = balloc(sizeof(struct file_handle));
+    if (fopen(fd, kernel_drive, kernel_part, kernel_path)) {
+        panic("Could not open kernel file");
+    }
+
     uint32_t signature;
     fread(fd, &signature, 0x202, sizeof(uint32_t));
 
@@ -82,8 +110,11 @@ void linux_load(struct file_handle *fd, char *cmdline) {
 
     int initrd_part; {
         char buf[32];
-        config_get_value(buf, 0, 32, "INITRD_PARTITION");
-        initrd_part = (int)strtoui(buf);
+        if (!config_get_value(buf, 0, 32, "INITRD_PARTITION")) {
+            initrd_part = fd->partition;
+        } else {
+            initrd_part = (int)strtoui(buf);
+        }
     }
 
     struct file_handle initrd;

src/protos/linux.h

@@ -3,6 +3,6 @@
 
 #include <fs/file.h>
 
-void linux_load(struct file_handle *fd, char *cmdline);
+void linux_load(char *cmdline, int boot_drive);
 
 #endif

src/protos/stivale.c

@@ -46,7 +46,35 @@ struct stivale_struct {
 
 struct stivale_struct stivale_struct = {0};
 
-void stivale_load(struct file_handle *fd, char *cmdline) {
+void stivale_load(char *cmdline, int boot_drive) {
+    int kernel_drive; {
+        char buf[32];
+        if (!config_get_value(buf, 0, 32, "KERNEL_DRIVE")) {
+            kernel_drive = boot_drive;
+        } else {
+            kernel_drive = (int)strtoui(buf);
+        }
+    }
+
+    int kernel_part; {
+        char buf[32];
+        if (!config_get_value(buf, 0, 32, "KERNEL_PARTITION")) {
+            panic("KERNEL_PARTITION not specified");
+        } else {
+            kernel_part = (int)strtoui(buf);
+        }
+    }
+
+    char *kernel_path = balloc(128);
+    if (!config_get_value(kernel_path, 0, 128, "KERNEL_PATH")) {
+        panic("KERNEL_PATH not specified");
+    }
+
+    struct file_handle *fd = balloc(sizeof(struct file_handle));
+    if (fopen(fd, kernel_drive, kernel_part, kernel_path)) {
+        panic("Could not open kernel file");
+    }
+
     struct stivale_header stivale_hdr;
 
     int bits = elf_bits(fd);

src/protos/stivale.h

@@ -3,6 +3,6 @@
 
 #include <fs/file.h>
 
-void stivale_load(struct file_handle *fd, char *cmdline);
+void stivale_load(char *cmdline, int boot_drive);
 
 #endif

test/qloader2.cfg

@@ -2,10 +2,11 @@ TIMEOUT=3
 
 :Test kernel
 
+PROTOCOL=stivale
+
 KERNEL_PARTITION=1
 KERNEL_PATH=/boot/test.elf
-KERNEL_PROTO=stivale
-KERNEL_CMDLINE=none
+KERNEL_CMDLINE=something
 
 MODULE_PARTITION=1
 MODULE_PATH=qloader2.cfg