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-rw-r--r--src/kernel/arch/i386/boot.c40
-rw-r--r--src/kernel/arch/i386/driver/ps2.c21
-rw-r--r--src/kernel/arch/i386/driver/ps2.h11
-rw-r--r--src/kernel/arch/i386/driver/serial.c25
-rw-r--r--src/kernel/arch/i386/driver/serial.h13
-rw-r--r--src/kernel/arch/i386/tty/tty.c2
-rw-r--r--src/kernel/main.c3
-rw-r--r--src/kernel/mem/alloc.c4
-rw-r--r--src/kernel/mem/alloc.h2
-rw-r--r--src/kernel/syscalls.c3
-rw-r--r--src/kernel/vfs/mount.c68
-rw-r--r--src/kernel/vfs/mount.h4
-rw-r--r--src/kernel/vfs/request.c2
-rw-r--r--src/kernel/vfs/request.h9
-rw-r--r--src/kernel/vfs/root.c7
-rw-r--r--src/kernel/vfs/root.h5
16 files changed, 107 insertions, 112 deletions
diff --git a/src/kernel/arch/i386/boot.c b/src/kernel/arch/i386/boot.c
index a3716ee..be80f73 100644
--- a/src/kernel/arch/i386/boot.c
+++ b/src/kernel/arch/i386/boot.c
@@ -1,19 +1,34 @@
#include <kernel/arch/generic.h>
#include <kernel/arch/i386/ata.h>
#include <kernel/arch/i386/boot.h>
+#include <kernel/arch/i386/driver/ps2.h>
+#include <kernel/arch/i386/driver/serial.h>
#include <kernel/arch/i386/gdt.h>
#include <kernel/arch/i386/interrupts/idt.h>
#include <kernel/arch/i386/interrupts/irq.h>
#include <kernel/arch/i386/multiboot.h>
#include <kernel/main.h>
+#include <kernel/mem/alloc.h>
#include <kernel/panic.h>
+#include <kernel/vfs/root.h>
void tty_init(void); // TODO put this in a header file
+static void find_init(struct multiboot_info *multiboot, struct kmain_info *info)
+{
+ struct multiboot_mod *module = &multiboot->mods[0];
+ if (multiboot->mods_count < 1) {
+ kprintf("can't find init! ");
+ panic_invalid_state();
+ }
+ info->init.at = module->start;
+ info->init.size = module->end - module->start;
+
+}
+
void kmain_early(struct multiboot_info *multiboot) {
struct kmain_info info;
- // setup some basic stuff
tty_init();
kprintf("gdt...");
gdt_init();
@@ -21,20 +36,19 @@ void kmain_early(struct multiboot_info *multiboot) {
idt_init();
kprintf("irq...");
irq_init();
- kprintf("ata...");
- ata_init();
-
- { // find the init module
- struct multiboot_mod *module = &multiboot->mods[0];
- if (multiboot->mods_count < 1) {
- kprintf("can't find init! ");
- panic_invalid_state(); // no init
- }
- info.init.at = module->start;
- info.init.size = module->end - module->start;
- }
info.memtop = (void*) (multiboot->mem_upper * 1024);
+ find_init(multiboot, &info);
+ kprintf("mem...\n");
+ mem_init(&info);
+
+ kprintf("rootfs...");
+ vfs_root_init();
+ ps2_init();
+ serial_init();
+
+ kprintf("ata...");
+ ata_init();
kmain(info);
}
diff --git a/src/kernel/arch/i386/driver/ps2.c b/src/kernel/arch/i386/driver/ps2.c
index 8955100..97e2878 100644
--- a/src/kernel/arch/i386/driver/ps2.c
+++ b/src/kernel/arch/i386/driver/ps2.c
@@ -2,6 +2,7 @@
#include <kernel/arch/i386/interrupts/irq.h>
#include <kernel/mem/virt.h>
#include <kernel/panic.h>
+#include <kernel/vfs/request.h>
#include <shared/container/ring.h>
#include <shared/mem.h>
@@ -12,23 +13,33 @@ static volatile ring_t backlog = {(void*)backlog_buf, BACKLOG_CAPACITY, 0, 0};
static struct vfs_request *blocked_on = NULL;
-bool ps2_ready(void) {
+
+static void accept(struct vfs_request *req);
+static bool is_ready(struct vfs_backend *self);
+
+
+static struct vfs_backend backend = BACKEND_KERN(is_ready, accept);
+void ps2_init(void) { vfs_mount_root_register("/ps2", &backend); }
+
+
+
+static bool ps2_ready(void) {
return ring_size((void*)&backlog) > 0;
}
void ps2_recv(uint8_t s) {
ring_put1b((void*)&backlog, s);
if (blocked_on) {
- vfs_ps2_accept(blocked_on);
+ accept(blocked_on);
blocked_on = NULL;
}
}
-size_t ps2_read(uint8_t *buf, size_t len) {
+static size_t ps2_read(uint8_t *buf, size_t len) {
return ring_get((void*)&backlog, buf, len);
}
-void vfs_ps2_accept(struct vfs_request *req) {
+static void accept(struct vfs_request *req) {
// when you fix something here go also fix it in the COM1 driver
static uint8_t buf[32]; // pretty damn stupid
int ret;
@@ -60,4 +71,4 @@ void vfs_ps2_accept(struct vfs_request *req) {
}
}
-bool vfs_ps2_ready(struct vfs_backend *self) { return blocked_on == NULL; }
+static bool is_ready(struct vfs_backend *self) { return blocked_on == NULL; }
diff --git a/src/kernel/arch/i386/driver/ps2.h b/src/kernel/arch/i386/driver/ps2.h
index c5d0ce1..54e8fb2 100644
--- a/src/kernel/arch/i386/driver/ps2.h
+++ b/src/kernel/arch/i386/driver/ps2.h
@@ -1,12 +1,5 @@
#pragma once
-#include <kernel/vfs/request.h>
-#include <stdbool.h>
-#include <stddef.h>
#include <stdint.h>
-bool ps2_ready(void);
-void ps2_recv(uint8_t scancode);
-size_t ps2_read(uint8_t *buf, size_t max_len);
-
-void vfs_ps2_accept(struct vfs_request *);
-bool vfs_ps2_ready(struct vfs_backend *);
+void ps2_recv(uint8_t s);
+void ps2_init(void);
diff --git a/src/kernel/arch/i386/driver/serial.c b/src/kernel/arch/i386/driver/serial.c
index 170cc4d..614d4e0 100644
--- a/src/kernel/arch/i386/driver/serial.c
+++ b/src/kernel/arch/i386/driver/serial.c
@@ -16,6 +16,17 @@ static const int COM1 = 0x3f8;
static struct vfs_request *blocked_on = NULL;
+static void accept(struct vfs_request *req);
+static bool is_ready(struct vfs_backend *self);
+
+
+static struct vfs_backend backend = BACKEND_KERN(is_ready, accept);
+void serial_init(void) { vfs_mount_root_register("/com1", &backend); }
+
+
+
+
+
static void serial_selftest(void) {
char b = 0x69;
port_out8(COM1 + 4, 0b00011110); // enable loopback mode
@@ -23,7 +34,7 @@ static void serial_selftest(void) {
assert(port_in8(COM1) == b);
}
-void serial_init(void) {
+void serial_preinit(void) {
// see https://www.sci.muni.cz/docs/pc/serport.txt
// set baud rate divisor
port_out8(COM1 + 3, 0b10000000); // enable DLAB
@@ -40,20 +51,20 @@ void serial_init(void) {
}
-bool serial_ready(void) {
+static bool serial_ready(void) {
return ring_size((void*)&backlog) > 0;
}
void serial_irq(void) {
ring_put1b((void*)&backlog, port_in8(COM1));
if (blocked_on) {
- vfs_com1_accept(blocked_on);
+ accept(blocked_on);
blocked_on = NULL;
// TODO vfs_backend_tryaccept
}
}
-size_t serial_read(char *buf, size_t len) {
+static size_t serial_read(char *buf, size_t len) {
return ring_get((void*)&backlog, buf, len);
}
@@ -69,8 +80,8 @@ void serial_write(const char *buf, size_t len) {
}
-void vfs_com1_accept(struct vfs_request *req) {
- static uint8_t buf[32];
+static void accept(struct vfs_request *req) {
+ static char buf[32];
int ret;
switch (req->type) {
case VFSOP_OPEN:
@@ -109,4 +120,4 @@ void vfs_com1_accept(struct vfs_request *req) {
}
}
-bool vfs_com1_ready(struct vfs_backend *self) { return blocked_on == NULL; }
+static bool is_ready(struct vfs_backend *self) { return blocked_on == NULL; }
diff --git a/src/kernel/arch/i386/driver/serial.h b/src/kernel/arch/i386/driver/serial.h
index 6aff142..6a4876e 100644
--- a/src/kernel/arch/i386/driver/serial.h
+++ b/src/kernel/arch/i386/driver/serial.h
@@ -3,13 +3,8 @@
#include <stdbool.h>
#include <stddef.h>
-void serial_init(void);
+void serial_preinit(void);
+void serial_irq(void);
+void serial_write(const char *buf, size_t len);
-bool serial_ready(void);
-void serial_irq(void);
-size_t serial_read(char *buf, size_t len);
-
-void serial_write(const char *buf, size_t len);
-
-void vfs_com1_accept(struct vfs_request *);
-bool vfs_com1_ready(struct vfs_backend *);
+void serial_init(void);
diff --git a/src/kernel/arch/i386/tty/tty.c b/src/kernel/arch/i386/tty/tty.c
index d4a97fb..a1964f9 100644
--- a/src/kernel/arch/i386/tty/tty.c
+++ b/src/kernel/arch/i386/tty/tty.c
@@ -5,7 +5,7 @@
void tty_init(void) {
vga_clear();
- serial_init();
+ serial_preinit();
vga_write("\x03 ", 2); // cp437 heart
serial_write("<3 ", 3);
diff --git a/src/kernel/main.c b/src/kernel/main.c
index 5023ea9..bbdd234 100644
--- a/src/kernel/main.c
+++ b/src/kernel/main.c
@@ -7,9 +7,6 @@
#include <stdint.h>
void kmain(struct kmain_info info) {
- kprintf("mem...\n");
- mem_init(&info);
-
kprintf("tests...\n");
tests_all();
diff --git a/src/kernel/mem/alloc.c b/src/kernel/mem/alloc.c
index 3925689..797b018 100644
--- a/src/kernel/mem/alloc.c
+++ b/src/kernel/mem/alloc.c
@@ -102,9 +102,9 @@ void page_free(void *first_addr, size_t pages) {
}
}
-void kmalloc_sanity(void *addr) {
+void kmalloc_sanity(const void *addr) {
assert(addr);
- struct malloc_hdr *hdr = addr - sizeof(struct malloc_hdr);
+ const struct malloc_hdr *hdr = addr - sizeof(struct malloc_hdr);
assert(hdr->magic == MALLOC_MAGIC);
if (hdr->next) assert(hdr->next->prev == hdr);
if (hdr->prev) assert(hdr->prev->next == hdr);
diff --git a/src/kernel/mem/alloc.h b/src/kernel/mem/alloc.h
index 0760d67..99fd931 100644
--- a/src/kernel/mem/alloc.h
+++ b/src/kernel/mem/alloc.h
@@ -12,6 +12,6 @@ void *page_alloc(size_t pages);
// frees `pages` consecutive pages starting from *first
void page_free(void *first, size_t pages);
-void kmalloc_sanity(void *addr);
+void kmalloc_sanity(const void *addr);
void *kmalloc(size_t len);
void kfree(void *ptr);
diff --git a/src/kernel/syscalls.c b/src/kernel/syscalls.c
index aa2d45f..01d42a0 100644
--- a/src/kernel/syscalls.c
+++ b/src/kernel/syscalls.c
@@ -186,7 +186,8 @@ handle_t _syscall_fs_fork2(void) {
if (front < 0) SYSCALL_RETURN(-1);
process_current->handles[front] = handle_init(HANDLE_FS_FRONT);
- backend = kmalloc(sizeof *backend); // TODO never freed
+ backend = kmalloc(sizeof *backend);
+ backend->heap = true;
backend->is_user = true;
backend->potential_handlers = 1;
backend->refcount = 2; // child + handle
diff --git a/src/kernel/vfs/mount.c b/src/kernel/vfs/mount.c
index 178cc54..77cc14b 100644
--- a/src/kernel/vfs/mount.c
+++ b/src/kernel/vfs/mount.c
@@ -1,63 +1,13 @@
#include <kernel/mem/alloc.h>
#include <kernel/panic.h>
#include <kernel/vfs/mount.h>
-#include <kernel/vfs/root.h>
#include <shared/mem.h>
// TODO not the place where this should be done
-#include <kernel/arch/i386/driver/ps2.h>
-#include <kernel/arch/i386/driver/serial.h>
+static struct vfs_mount *mount_root = NULL;
struct vfs_mount *vfs_mount_seed(void) {
- struct vfs_mount *mount = kmalloc(sizeof *mount);
- struct vfs_backend *backend = kmalloc(sizeof *backend);
- backend->is_user = false;
- backend->potential_handlers = 1;
- backend->refcount = 1;
- backend->kern.ready = vfs_root_ready;
- backend->kern.accept = vfs_root_accept;
- *mount = (struct vfs_mount){
- .prev = NULL,
- .prefix = NULL,
- .prefix_len = 0,
- .backend = backend,
- .refs = 1,
- };
-
- // what a mess.
- // TODO register funcs
- struct vfs_mount *ps2 = kmalloc(sizeof *ps2);
- backend = kmalloc(sizeof *backend);
- backend->is_user = false;
- backend->potential_handlers = 1;
- backend->refcount = 1;
- backend->kern.ready = vfs_ps2_ready;
- backend->kern.accept = vfs_ps2_accept;
- *ps2 = (struct vfs_mount){
- .prev = mount,
- .prefix = "/ps2",
- .prefix_len = 4,
- .backend = backend,
- .refs = 1,
- };
-
- // oh god oh fuck
- struct vfs_mount *com = kmalloc(sizeof *com);
- backend = kmalloc(sizeof *backend);
- backend->is_user = false;
- backend->potential_handlers = 1;
- backend->refcount = 1;
- backend->kern.ready = vfs_com1_ready;
- backend->kern.accept = vfs_com1_accept;
- *com = (struct vfs_mount){
- .prev = ps2,
- .prefix = "/com1",
- .prefix_len = 5,
- .backend = backend,
- .refs = 1,
- };
-
- return com;
+ return mount_root;
}
struct vfs_mount *vfs_mount_resolve(
@@ -90,8 +40,20 @@ void vfs_mount_remref(struct vfs_mount *mnt) {
if (mnt->backend)
vfs_backend_refdown(mnt->backend);
if (mnt->prefix_owned)
- kfree(mnt->prefix);
+ kfree((void*)mnt->prefix);
kfree(mnt);
if (prev) vfs_mount_remref(prev);
}
+
+void vfs_mount_root_register(const char *path, struct vfs_backend *backend) {
+ struct vfs_mount *mount = kmalloc(sizeof *mount);
+ *mount = (struct vfs_mount){
+ .prev = mount_root,
+ .prefix = path,
+ .prefix_len = strlen(path),
+ .backend = backend,
+ .refs = 1,
+ };
+ mount_root = mount;
+}
diff --git a/src/kernel/vfs/mount.h b/src/kernel/vfs/mount.h
index 4aa08d4..bcd3460 100644
--- a/src/kernel/vfs/mount.h
+++ b/src/kernel/vfs/mount.h
@@ -4,7 +4,7 @@
struct vfs_mount {
struct vfs_mount *prev;
- char *prefix;
+ const char *prefix;
size_t prefix_len;
bool prefix_owned;
struct vfs_backend *backend;
@@ -20,3 +20,5 @@ struct vfs_mount *vfs_mount_resolve(
struct vfs_mount *top, const char *path, size_t path_len);
/** Decrements the reference count, potentially freeing the mount. */
void vfs_mount_remref(struct vfs_mount *mnt);
+
+void vfs_mount_root_register(const char *path, struct vfs_backend *backend);
diff --git a/src/kernel/vfs/request.c b/src/kernel/vfs/request.c
index 3e7c9f0..0c3084d 100644
--- a/src/kernel/vfs/request.c
+++ b/src/kernel/vfs/request.c
@@ -134,5 +134,5 @@ void vfs_backend_refdown(struct vfs_backend *b) {
if (--(b->refcount) > 0) return;
assert(!b->queue);
- kfree(b);
+ if (b->heap) kfree(b);
}
diff --git a/src/kernel/vfs/request.h b/src/kernel/vfs/request.h
index 9dc6088..e034bc6 100644
--- a/src/kernel/vfs/request.h
+++ b/src/kernel/vfs/request.h
@@ -14,6 +14,7 @@ struct vfs_backend {
* struct process
* struct handle
*/
+ bool heap;
size_t potential_handlers; // 0 - orphaned
struct vfs_request *queue;
@@ -64,3 +65,11 @@ void vfs_backend_tryaccept(struct vfs_backend *);
void vfs_backend_user_accept(struct vfs_request *req);
void vfs_backend_refdown(struct vfs_backend *);
+
+
+#define BACKEND_KERN(ready, accept) ((struct vfs_backend){\
+ .is_user = false, \
+ .heap = false, \
+ .potential_handlers = 1, \
+ .refcount = 1, \
+ .kern = {ready, accept}})
diff --git a/src/kernel/vfs/root.c b/src/kernel/vfs/root.c
index 989c77e..8ba2043 100644
--- a/src/kernel/vfs/root.c
+++ b/src/kernel/vfs/root.c
@@ -130,7 +130,7 @@ static int handle(struct vfs_request *req, bool *ready) {
}
}
-void vfs_root_accept(struct vfs_request *req) {
+static void accept(struct vfs_request *req) {
if (req->caller) {
bool ready = true;
int ret = handle(req, &ready);
@@ -142,6 +142,9 @@ void vfs_root_accept(struct vfs_request *req) {
}
}
-bool vfs_root_ready(struct vfs_backend *self) {
+static bool is_ready(struct vfs_backend *self) {
return true;
}
+
+static struct vfs_backend backend = BACKEND_KERN(is_ready, accept);
+void vfs_root_init(void) { vfs_mount_root_register("", &backend); }
diff --git a/src/kernel/vfs/root.h b/src/kernel/vfs/root.h
index 3db958d..dd72202 100644
--- a/src/kernel/vfs/root.h
+++ b/src/kernel/vfs/root.h
@@ -1,5 +1,2 @@
#pragma once
-#include <kernel/vfs/request.h>
-
-void vfs_root_accept(struct vfs_request *);
-bool vfs_root_ready(struct vfs_backend *);
+void vfs_root_init(void);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-22 20:59:30 +0000