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ssfn: try making normal renderer work (i hope google won't dmca this for adding noto inside lol)

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RaphProductions 2025-05-08 19:01:37 +02:00
parent a6f371b4ad
commit 442b26df09
13 changed files with 11150 additions and 261 deletions
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8518
kernel/src/font.c Normal file
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261
kernel/src/font.h
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@ -1,261 +1,4 @@
#pragma once
// array size is 4096
unsigned char VGA8[] = {
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0x00, 0x00, 0x1e, 0x30, 0x18, 0x0c, 0x3e, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xdb, 0xdb, 0xdb, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, 0x06, 0x7e, 0xdb, 0xdb, 0xf3, 0x7e, 0x60, 0xc0, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x1c, 0x30, 0x60, 0x60, 0x7c, 0x60, 0x60, 0x60, 0x30, 0x1c, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x7e, 0x18, 0x18, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x30, 0x18, 0x0c, 0x06, 0x0c, 0x18, 0x30, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x0c, 0x18, 0x30, 0x60, 0x30, 0x18, 0x0c, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x0e, 0x1b, 0x1b, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0xd8, 0xd8, 0xd8, 0x70, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x7e, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x76, 0xdc, 0x00, 0x76, 0xdc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x38, 0x6c, 0x6c, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x0f, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0xec, 0x6c, 0x6c, 0x3c, 0x1c, 0x00, 0x00, 0x00, 0x00,
0x00, 0xd8, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x70, 0xd8, 0x30, 0x60, 0xc8, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
extern unsigned char VGA8[];
extern unsigned char NotoRegular[];

18
kernel/src/lib/spinlock.h Normal file
View file

@ -0,0 +1,18 @@
#pragma once
#include <stdint.h>
typedef struct spinlock
{
volatile int locked;
} spinlock_t;
inline void spinlock_acquire(spinlock_t *lock) {
while (__sync_lock_test_and_set(&(lock)->locked, 1))
while ((lock)->locked)
__asm__ volatile("pause");
}
inline void spinlock_release(spinlock_t *lock) {
__sync_lock_release(&(lock)->locked);
}

47
kernel/src/main.c
View file

@ -1,6 +1,9 @@
#include "exec/elf.h"
#include "font.h"
#include "mm/pmm.h"
#include "mm/vma.h"
#include "mm/vmm.h"
#include "mm/memop.h"
#include "rt.h"
#include "sched/sched.h"
#include "sys/arch/x86_64/cpuid.h"
@ -18,6 +21,9 @@
#include <sys/arch/x86_64/gdt.h>
#include <sys/arch/x86_64/idt.h>
#define SSFN_IMPLEMENTATION /* use the special renderer for 32 bit truecolor packed pixels */
#include <sys/gfx/ssfn.h>
// Set the base revision to 3, this is recommended as this is the latest
// base revision described by the Limine boot protocol specification.
// See specification for further info.
@ -117,6 +123,13 @@ void kmain(void) {
pmm_init();
vmm_init();
kernel_vma_context = vma_create_context(vmm_kernel_pm);
if (!kernel_vma_context) {
log("kernel - vma ctx creation failed. halting\n");
asm("cli");
while (1)
asm("hlt");
}
pit_init(1000);
sched_init();
@ -127,6 +140,37 @@ void kmain(void) {
elf_load((char*)f->address);
memset(framebuffer->address, 0, framebuffer->pitch * framebuffer->height);
ssfn_t sctx = { 0 }; /* the renderer context */
ssfn_buf_t buf = { /* the destination pixel buffer */
.ptr = framebuffer->address, /* address of the buffer */
.w = framebuffer->width, /* width */
.h = framebuffer->height, /* height */
.p = framebuffer->pitch, /* bytes per line */
.x = 100, /* pen position */
.y = 100,
.fg = 0xFF808080 /* foreground color */
};
/* add one or more fonts to the context. Fonts must be already in memory */
ssfn_load(&sctx, &NotoRegular);
/* select the typeface to use */
ssfn_select(&sctx,
SSFN_FAMILY_SANS, NULL, /* family */
SSFN_STYLE_REGULAR | SSFN_STYLE_UNDERLINE, /* style */
64 /* size */
);
/* rasterize the first glyph in an UTF-8 string into a 32 bit packed pixel buffer */
/* returns how many bytes were consumed from the string */
ssfn_render(&sctx, &buf, "Hello World.");
/* free resources */
ssfn_free(&sctx);
//uint8_t *mem = pmm_request_page();
//mem[0] = 0xCD;
//mem[1] = 0x80;
@ -137,8 +181,7 @@ void kmain(void) {
//vmm_map(pm, 0x1000, (uint64_t)mem, VMM_PRESENT | VMM_USER);
//sched_create("Init", 0x1000, pm, SCHED_USER_PROCESS);
log("kernel - Soaplin initialized sucessfully.\n");
//log("kernel - Soaplin initialized sucessfully.\n");
while (1)
;;//__asm__ volatile ("hlt");
}

649
kernel/src/mm/liballoc/liballoc.c Normal file
View file

@ -0,0 +1,649 @@
// Copyright: Durand Miller <clutter@djm.co.za>
#include <mm/liballoc/liballoc.h>
#define VERSION "1.1"
#define ALIGNMENT 16ul
#define ALIGN_TYPE char
#define ALIGN_INFO sizeof(ALIGN_TYPE) * 16
#define USE_CASE1
#define USE_CASE2
#define USE_CASE3
#define USE_CASE4
#define USE_CASE5
#define ALIGN(ptr) \
if (ALIGNMENT > 1) \
{ \
uintptr_t diff; \
ptr = (void *)((uintptr_t)ptr + ALIGN_INFO); \
diff = (uintptr_t)ptr & (ALIGNMENT - 1); \
if (diff != 0) \
{ \
diff = ALIGNMENT - diff; \
ptr = (void *)((uintptr_t)ptr + diff); \
} \
*((ALIGN_TYPE *)((uintptr_t)ptr - ALIGN_INFO)) = \
diff + ALIGN_INFO; \
}
#define UNALIGN(ptr) \
if (ALIGNMENT > 1) \
{ \
uintptr_t diff = *((ALIGN_TYPE *)((uintptr_t)ptr - ALIGN_INFO)); \
if (diff < (ALIGNMENT + ALIGN_INFO)) \
{ \
ptr = (void *)((uintptr_t)ptr - diff); \
} \
}
#define LIBALLOC_MAGIC 0xc001c0de
#define LIBALLOC_DEAD 0xdeaddead
struct liballoc_major
{
struct liballoc_major *prev;
struct liballoc_major *next;
unsigned int pages;
unsigned int size;
unsigned int usage;
struct liballoc_minor *first;
};
struct liballoc_minor
{
struct liballoc_minor *prev;
struct liballoc_minor *next;
struct liballoc_major *block;
unsigned int magic;
unsigned int size;
unsigned int req_size;
};
static struct liballoc_major *l_memRoot = NULL;
static struct liballoc_major *l_bestBet = NULL;
static unsigned int l_pageSize = 4096;
static unsigned int l_pageCount = 16;
static unsigned long long l_allocated = 0;
static unsigned long long l_inuse = 0;
static long long l_warningCount = 0;
static long long l_errorCount = 0;
static long long l_possibleOverruns = 0;
static void *liballoc_memset(void *s, int c, size_t n)
{
unsigned int i;
for (i = 0; i < n; i++)
((char *)s)[i] = c;
return s;
}
static void *liballoc_memcpy(void *s1, const void *s2, size_t n)
{
char *cdest;
char *csrc;
unsigned int *ldest = (unsigned int *)s1;
unsigned int *lsrc = (unsigned int *)s2;
while (n >= sizeof(unsigned int))
{
*ldest++ = *lsrc++;
n -= sizeof(unsigned int);
}
cdest = (char *)ldest;
csrc = (char *)lsrc;
while (n > 0)
{
*cdest++ = *csrc++;
n -= 1;
}
return s1;
}
#if _DEBUG
void liballoc_dump()
{
#ifdef _DEBUG
struct liballoc_major *maj = l_memRoot;
struct liballoc_minor *min = NULL;
#endif
info("------ Memory data ---------------");
info("System memory allocated: %i bytes", l_allocated);
info("Memory in used (malloc'ed): %i bytes", l_inuse);
info("Warning count: %i", l_warningCount);
info("Error count: %i", l_errorCount);
info("Possible overruns: %i", l_possibleOverruns);
#ifdef _DEBUG
while (maj != NULL)
{
info("%x: total = %i, used = %i",
maj,
maj->size,
maj->usage);
min = maj->first;
while (min != NULL)
{
info(" %x: %i bytes",
min,
min->size);
min = min->next;
}
maj = maj->next;
}
#endif
}
#else
void liballoc_dump()
{
return;
}
#endif
static struct liballoc_major *allocate_new_page(unsigned int size)
{
unsigned int st;
struct liballoc_major *maj;
st = size + sizeof(struct liballoc_major);
st += sizeof(struct liballoc_minor);
if ((st % l_pageSize) == 0)
st = st / (l_pageSize);
else
st = st / (l_pageSize) + 1;
if (st < l_pageCount)
st = l_pageCount;
maj = (struct liballoc_major *)liballoc_alloc(st);
if (maj == NULL)
{
l_warningCount += 1;
log("liballoc - (warning) liballoc_alloc( %i ) return NULL", st);
return NULL;
}
maj->prev = NULL;
maj->next = NULL;
maj->pages = st;
maj->size = st * l_pageSize;
maj->usage = sizeof(struct liballoc_major);
maj->first = NULL;
l_allocated += maj->size;
log("liballoc - Resource allocated %x of %i pages (%i bytes) for %i size.", maj, st, maj->size, size);
log("liballoc - Total memory usage = %i KB", (int)((l_allocated / (1024))));
return maj;
}
void *PREFIX(malloc)(size_t req_size)
{
int startedBet = 0;
unsigned long long bestSize = 0;
void *p = NULL;
uintptr_t diff;
struct liballoc_major *maj;
struct liballoc_minor *min;
struct liballoc_minor *new_min;
unsigned long size = req_size;
if (ALIGNMENT > 1)
{
size += ALIGNMENT + ALIGN_INFO;
}
liballoc_lock();
if (size == 0)
{
l_warningCount += 1;
log("liballoc - (warning) alloc( 0 ) called from %x",
__builtin_return_address(0));
liballoc_unlock();
return PREFIX(malloc)(1);
}
if (l_memRoot == NULL)
{
log("liballoc - initialization of liballoc " VERSION "");
l_memRoot = allocate_new_page(size);
if (l_memRoot == NULL)
{
liballoc_unlock();
log("liballoc - initial l_memRoot initialization failed", p);
return NULL;
}
log("liballoc - set up first memory major %x", l_memRoot);
}
log("liballoc - %x PREFIX(malloc)( %i ): ",
__builtin_return_address(0),
size);
maj = l_memRoot;
startedBet = 0;
if (l_bestBet != NULL)
{
bestSize = l_bestBet->size - l_bestBet->usage;
if (bestSize > (size + sizeof(struct liballoc_minor)))
{
maj = l_bestBet;
startedBet = 1;
}
}
while (maj != NULL)
{
diff = maj->size - maj->usage;
if (bestSize < diff)
{
l_bestBet = maj;
bestSize = diff;
}
#ifdef USE_CASE1
if (diff < (size + sizeof(struct liballoc_minor)))
{
log("liballoc - (warning) CASE 1: Insufficient space in block %x", maj);
if (maj->next != NULL)
{
maj = maj->next;
continue;
}
if (startedBet == 1)
{
maj = l_memRoot;
startedBet = 0;
continue;
}
maj->next = allocate_new_page(size);
if (maj->next == NULL)
break;
maj->next->prev = maj;
maj = maj->next;
}
#endif
#ifdef USE_CASE2
if (maj->first == NULL)
{
maj->first = (struct liballoc_minor *)((uintptr_t)maj + sizeof(struct liballoc_major));
maj->first->magic = LIBALLOC_MAGIC;
maj->first->prev = NULL;
maj->first->next = NULL;
maj->first->block = maj;
maj->first->size = size;
maj->first->req_size = req_size;
maj->usage += size + sizeof(struct liballoc_minor);
l_inuse += size;
p = (void *)((uintptr_t)(maj->first) + sizeof(struct liballoc_minor));
ALIGN(p);
log("liballoc - (warning) CASE 2: returning %x", p);
liballoc_unlock();
return p;
}
#endif
#ifdef USE_CASE3
diff = (uintptr_t)(maj->first);
diff -= (uintptr_t)maj;
diff -= sizeof(struct liballoc_major);
if (diff >= (size + sizeof(struct liballoc_minor)))
{
maj->first->prev = (struct liballoc_minor *)((uintptr_t)maj + sizeof(struct liballoc_major));
maj->first->prev->next = maj->first;
maj->first = maj->first->prev;
maj->first->magic = LIBALLOC_MAGIC;
maj->first->prev = NULL;
maj->first->block = maj;
maj->first->size = size;
maj->first->req_size = req_size;
maj->usage += size + sizeof(struct liballoc_minor);
l_inuse += size;
p = (void *)((uintptr_t)(maj->first) + sizeof(struct liballoc_minor));
ALIGN(p);
log("liballoc - (warning) CASE 3: returning %x", p);
liballoc_unlock();
return p;
}
#endif
#ifdef USE_CASE4
min = maj->first;
while (min != NULL)
{
if (min->next == NULL)
{
diff = (uintptr_t)(maj) + maj->size;
diff -= (uintptr_t)min;
diff -= sizeof(struct liballoc_minor);
diff -= min->size;
if (diff >= (size + sizeof(struct liballoc_minor)))
{
min->next = (struct liballoc_minor *)((uintptr_t)min + sizeof(struct liballoc_minor) + min->size);
min->next->prev = min;
min = min->next;
min->next = NULL;
min->magic = LIBALLOC_MAGIC;
min->block = maj;
min->size = size;
min->req_size = req_size;
maj->usage += size + sizeof(struct liballoc_minor);
l_inuse += size;
p = (void *)((uintptr_t)min + sizeof(struct liballoc_minor));
ALIGN(p);
log("liballoc - (warning) CASE 4.1: returning %x", p);
liballoc_unlock();
return p;
}
}
if (min->next != NULL)
{
diff = (uintptr_t)(min->next);
diff -= (uintptr_t)min;
diff -= sizeof(struct liballoc_minor);
diff -= min->size;
if (diff >= (size + sizeof(struct liballoc_minor)))
{
new_min = (struct liballoc_minor *)((uintptr_t)min + sizeof(struct liballoc_minor) + min->size);
new_min->magic = LIBALLOC_MAGIC;
new_min->next = min->next;
new_min->prev = min;
new_min->size = size;
new_min->req_size = req_size;
new_min->block = maj;
min->next->prev = new_min;
min->next = new_min;
maj->usage += size + sizeof(struct liballoc_minor);
l_inuse += size;
p = (void *)((uintptr_t)new_min + sizeof(struct liballoc_minor));
ALIGN(p);
log("liballoc - (warning) CASE 4.2: returning %x", p);
liballoc_unlock();
return p;
}
}
min = min->next;
}
#endif
#ifdef USE_CASE5
if (maj->next == NULL)
{
log("liballoc - (warning) CASE 5: block full");
if (startedBet == 1)
{
maj = l_memRoot;
startedBet = 0;
continue;
}
maj->next = allocate_new_page(size);
if (maj->next == NULL)
break;
maj->next->prev = maj;
}
#endif
maj = maj->next;
}
liballoc_unlock();
log("liballoc - (warning) All cases exhausted. No memory available.");
log("liballoc - (warning) PREFIX(malloc)( %i ) returning NULL.", size);
liballoc_dump();
return NULL;
}
void PREFIX(free)(void *ptr)
{
struct liballoc_minor *min;
struct liballoc_major *maj;
if (ptr == NULL)
{
l_warningCount += 1;
log("liballoc - (warning) PREFIX(free)( NULL ) called from %x",
__builtin_return_address(0));
return;
}
UNALIGN(ptr);
liballoc_lock();
min = (struct liballoc_minor *)((uintptr_t)ptr - sizeof(struct liballoc_minor));
if (min->magic != LIBALLOC_MAGIC)
{
l_errorCount += 1;
if (
((min->magic & 0xFFFFFF) == (LIBALLOC_MAGIC & 0xFFFFFF)) ||
((min->magic & 0xFFFF) == (LIBALLOC_MAGIC & 0xFFFF)) ||
((min->magic & 0xFF) == (LIBALLOC_MAGIC & 0xFF)))
{
l_possibleOverruns += 1;
log("liballoc - (warning) Possible 1-3 byte overrun for magic %x != %x",
min->magic,
LIBALLOC_MAGIC);
}
if (min->magic == LIBALLOC_DEAD)
{
log("liballoc - multiple PREFIX(free)() attempt on %x from %x.",
ptr,
__builtin_return_address(0));
}
else
{
log("liballoc - Bad PREFIX(free)( %x ) called from %x",
ptr,
__builtin_return_address(0));
}
liballoc_unlock();
return;
}
log("liballoc - %x PREFIX(free)( %x ): ",
__builtin_return_address(0),
ptr);
maj = min->block;
l_inuse -= min->size;
maj->usage -= (min->size + sizeof(struct liballoc_minor));
min->magic = LIBALLOC_DEAD;
if (min->next != NULL)
min->next->prev = min->prev;
if (min->prev != NULL)
min->prev->next = min->next;
if (min->prev == NULL)
maj->first = min->next;
if (maj->first == NULL)
{
if (l_memRoot == maj)
l_memRoot = maj->next;
if (l_bestBet == maj)
l_bestBet = NULL;
if (maj->prev != NULL)
maj->prev->next = maj->next;
if (maj->next != NULL)
maj->next->prev = maj->prev;
l_allocated -= maj->size;
liballoc_free(maj, maj->pages);
}
else
{
if (l_bestBet != NULL)
{
int bestSize = l_bestBet->size - l_bestBet->usage;
int majSize = maj->size - maj->usage;
if (majSize > bestSize)
l_bestBet = maj;
}
}
log("liballoc - (warning) OK");
liballoc_unlock();
}
void *PREFIX(calloc)(size_t nobj, size_t size)
{
int real_size;
void *p;
real_size = nobj * size;
p = PREFIX(malloc)(real_size);
liballoc_memset(p, 0, real_size);
return p;
}
void *PREFIX(realloc)(void *p, size_t size)
{
void *ptr;
struct liballoc_minor *min;
unsigned int real_size;
if (size == 0)
{
PREFIX(free)
(p);
return NULL;
}
if (p == NULL)
return PREFIX(malloc)(size);
ptr = p;
UNALIGN(ptr);
liballoc_lock();
min = (struct liballoc_minor *)((uintptr_t)ptr - sizeof(struct liballoc_minor));
if (min->magic != LIBALLOC_MAGIC)
{
l_errorCount += 1;
if (
((min->magic & 0xFFFFFF) == (LIBALLOC_MAGIC & 0xFFFFFF)) ||
((min->magic & 0xFFFF) == (LIBALLOC_MAGIC & 0xFFFF)) ||
((min->magic & 0xFF) == (LIBALLOC_MAGIC & 0xFF)))
{
l_possibleOverruns += 1;
log("liballoc - Possible 1-3 byte overrun for magic %x != %x",
min->magic,
LIBALLOC_MAGIC);
}
if (min->magic == LIBALLOC_DEAD)
{
log("liballoc - liballoc: multiple PREFIX(free)() attempt on %x from %x.",
ptr,
__builtin_return_address(0));
}
else
{
log("liballoc - liballoc: Bad PREFIX(free)( %x ) called from %x",
ptr,
__builtin_return_address(0));
}
liballoc_unlock();
return NULL;
}
real_size = min->req_size;
if (real_size >= size)
{
min->req_size = size;
liballoc_unlock();
return p;
}
liballoc_unlock();
ptr = PREFIX(malloc)(size);
liballoc_memcpy(ptr, p, real_size);
PREFIX(free)
(p);
return ptr;
}

25
kernel/src/mm/liballoc/liballoc.h Normal file
View file

@ -0,0 +1,25 @@
// Copyright: Durand Miller <clutter@djm.co.za>
#ifndef LIBALLOC_H
#define LIBALLOC_H
#include <stddef.h>
#include <stdint.h>
#include <sys/log.h>
#define PREFIX(func) k##func
#ifdef _DEBUG
void liballoc_dump();
#endif // _DEBUG
extern int liballoc_lock();
extern int liballoc_unlock();
extern void *liballoc_alloc(size_t);
extern int liballoc_free(void *, size_t);
extern void *PREFIX(malloc)(size_t);
extern void *PREFIX(realloc)(void *, size_t);
extern void *PREFIX(calloc)(size_t, size_t);
extern void PREFIX(free)(void *);
#endif // LIBALLOC_H

39
kernel/src/mm/liballoc/liballoc_soaplin.c Normal file
View file

@ -0,0 +1,39 @@
#include "mm/liballoc/liballoc.h"
#include "mm/vmm.h"
#include <mm/vma.h>
#include <lib/spinlock.h>
#include <stddef.h>
extern vma_context_t *kernel_vma_context;
static spinlock_t liballoc_lock_var = { 0 };
int liballoc_lock()
{
spinlock_acquire(&liballoc_lock_var);
return 0;
}
int liballoc_unlock()
{
spinlock_release(&liballoc_lock_var);
return 0;
}
void *liballoc_alloc(size_t pages)
{
return vma_alloc(kernel_vma_context, pages, VMM_PRESENT | VMM_WRITABLE);
}
int liballoc_free(void *ptr, size_t pages)
{
(void)pages;
vma_free(kernel_vma_context, ptr);
return 0;
}
extern void *malloc(size_t s) { return PREFIX(malloc)(s); }
extern void *realloc(void *v, size_t s) { return PREFIX(realloc)(v, s); }
extern void *calloc(size_t s1, size_t s) { return PREFIX(calloc)(s1, s); }
extern void free(void *v) { return PREFIX(free)(v); }

201
kernel/src/mm/vma.c Normal file
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@ -0,0 +1,201 @@
// credit to kevin for writing the vma
// go check his projects: https://github.com/kevinalavik
#include "mm/pmm.h"
#include "mm/vmm.h"
#include <mm/vma.h>
#include <mm/memop.h>
#include <sys/log.h>
vma_context_t *kernel_vma_context;
vma_context_t *vma_create_context(pagemap_t *pagemap)
{
log("vma - creating VMA context with pagemap: 0x%.16llx\n", (uint64_t)pagemap);
vma_context_t *ctx = (vma_context_t *)HIGHER_HALF(pmm_request_page());
if (ctx == NULL)
{
log("vma - failed to allocate VMA context\n");
return NULL;
}
log("vma - allocated VMA context at 0x%.16llx\n", (uint64_t)ctx);
memset(ctx, 0, sizeof(vma_context_t));
log("vma - zeroed out VMA context at 0x%.16llx\n", (uint64_t)ctx);
ctx->root = (vma_region_t *)HIGHER_HALF(pmm_request_page());
if (ctx->root == NULL)
{
log("vma - failed to allocate root region\n");
pmm_free_page((void *)PHYSICAL(ctx));
return NULL;
}
log("vma - allocated root region at 0x%.16llx\n", (uint64_t)ctx->root);
ctx->pagemap = pagemap;
ctx->root->start = PMM_PAGE_SIZE;
ctx->root->size = 0;
log("vma - VMA context created at 0x%.16llx with root region at 0x%.16llx\n", (uint64_t)ctx, (uint64_t)ctx->root);
return ctx;
}
void vma_destroy_context(vma_context_t *ctx)
{
log("vma - destroying VMA context at 0x%.16llx\n", (uint64_t)ctx);
if (ctx->root == NULL || ctx->pagemap == NULL)
{
log("vma - invalid context or root passed to vma_destroy_context\n");
return;
}
vma_region_t *region = ctx->root;
while (region != NULL)
{
log("vma - freeing region at 0x%.16llx\n", (uint64_t)region);
vma_region_t *next = region->next;
pmm_free_page((void *)PHYSICAL(region));
region = next;
}
pmm_free_page((void *)PHYSICAL(ctx));
log("vma - destroyed VMA context at 0x%.16llx\n", (uint64_t)ctx);
}
void *vma_alloc(vma_context_t *ctx, uint64_t size, uint64_t flags)
{
if (ctx == NULL || ctx->root == NULL || ctx->pagemap == NULL)
{
log("vma - invalid context or root passed to vma_alloc\n");
return NULL;
}
vma_region_t *region = ctx->root;
vma_region_t *new_region;
vma_region_t *last_region = ctx->root;
while (region != NULL)
{
if (region->next == NULL || region->start + region->size < region->next->start)
{
new_region = (vma_region_t *)HIGHER_HALF(pmm_request_page());
if (new_region == NULL)
{
log("vma - failed to allocate new VMA region\n");
return NULL;
}
memset(new_region, 0, sizeof(vma_region_t));
new_region->size = size;
new_region->flags = flags;
new_region->start = region->start + region->size;
new_region->next = region->next;
new_region->prev = region;
region->next = new_region;
for (uint64_t i = 0; i < size; i++)
{
uint64_t page = (uint64_t)pmm_request_page();
if (page == 0)
{
log("vma - failed to allocate physical memory for VMA region\n");
return NULL;
}
vmm_map(ctx->pagemap, new_region->start + i * PMM_PAGE_SIZE, page, new_region->flags);
}
return (void *)new_region->start;
}
region = region->next;
}
new_region = (vma_region_t *)HIGHER_HALF(pmm_request_page());
if (new_region == NULL)
{
log("vma - failed to allocate new VMA region\n");
return NULL;
}
memset(new_region, 0, sizeof(vma_region_t));
last_region->next = new_region;
new_region->prev = last_region;
new_region->start = last_region->start + last_region->size;
new_region->size = size;
new_region->flags = flags;
new_region->next = NULL;
for (uint64_t i = 0; i < size; i++)
{
uint64_t page = (uint64_t)pmm_request_page();
if (page == 0)
{
log("vma - failed to allocate physical memory for VMA region\n");
return NULL;
}
vmm_map(ctx->pagemap, new_region->start + i * PMM_PAGE_SIZE, page, new_region->flags);
}
return (void *)new_region->start;
}
void vma_free(vma_context_t *ctx, void *ptr)
{
if (ctx == NULL)
{
log("vma - invalid context passed to vma_free\n");
return;
}
vma_region_t *region = ctx->root;
while (region != NULL)
{
if (region->start == (uint64_t)ptr)
{
log("vma - found region to free at 0x%.16llx\n", (uint64_t)region);
break;
}
region = region->next;
}
if (region == NULL)
{
log("vma - unable to find region to free at address 0x%.16llx\n", (uint64_t)ptr);
return;
}
vma_region_t *prev = region->prev;
vma_region_t *next = region->next;
for (uint64_t i = 0; i < region->size; i++)
{
uint64_t virt = region->start + i * PMM_PAGE_SIZE;
uint64_t phys = virt_to_phys(vmm_kernel_pm, virt);
if (phys != 0)
{
pmm_free_page((void *)phys);
vmm_unmap(ctx->pagemap, virt);
}
}
if (prev != NULL)
{
prev->next = next;
}
if (next != NULL)
{
next->prev = prev;
}
if (region == ctx->root)
{
ctx->root = next;
}
pmm_free_page((void *)PHYSICAL(region));
}

31
kernel/src/mm/vma.h Normal file
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@ -0,0 +1,31 @@
// credit to kevin for writing the vma
// go check his projects: https://github.com/kevinalavik
#pragma once
#include <mm/vmm.h>
#include <mm/pmm.h>
#include <stdint.h>
typedef struct vma_region
{
uint64_t start;
uint64_t size;
uint64_t flags;
struct vma_region *next;
struct vma_region *prev;
} vma_region_t;
typedef struct vma_context
{
pagemap_t *pagemap;
vma_region_t *root;
} vma_context_t;
extern vma_context_t *kernel_vma_context;
vma_context_t *vma_create_context(pagemap_t *pagemap);
void vma_destroy_context(vma_context_t *ctx);
void *vma_alloc(vma_context_t *ctx, uint64_t size, uint64_t flags);
void vma_free(vma_context_t *ctx, void *ptr);
void vma_dump_context(vma_context_t *ctx);

15
kernel/src/mm/vmm.c
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@ -171,6 +171,21 @@ uint64_t vmm_get_flags(pagemap_t* pm, uint64_t vaddr) {
return pml1[pml1_entry] & 0x7000000000000FFF;
}
uint64_t virt_to_phys(pagemap_t *pagemap, uint64_t virt)
{
uint64_t pml1_idx = (virt & (uint64_t)0x1ff << 12) >> 12;
uint64_t pml2_idx = (virt & (uint64_t)0x1ff << 21) >> 21;
uint64_t pml3_idx = (virt & (uint64_t)0x1ff << 30) >> 30;
uint64_t pml4_idx = (virt & (uint64_t)0x1ff << 39) >> 39;
uint64_t *pml3 = __vmm_get_next_lvl(pagemap->toplevel, pml4_idx, 0);
uint64_t *pml2 = __vmm_get_next_lvl(pml3, pml3_idx, 0);
uint64_t *pml1 = __vmm_get_next_lvl(pml2, pml2_idx, 0);
uint64_t phys_addr = pml1[pml1_idx] & 0x000FFFFFFFFFF000;
return phys_addr;
}
void vmm_map(pagemap_t *pm, uint64_t vaddr, uint64_t paddr, uint64_t flags) {
uint64_t pml4_entry = (vaddr >> 39) & 0x1ff;
uint64_t pml3_entry = (vaddr >> 30) & 0x1ff;

1
kernel/src/mm/vmm.h
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@ -38,5 +38,6 @@ void vmm_init();
void vmm_release_pm(pagemap_t *pm);
void vmm_load_pagemap(pagemap_t *pm);
uint64_t vmm_get_flags(pagemap_t* pm, uint64_t vaddr);
uint64_t virt_to_phys(pagemap_t *pagemap, uint64_t virt);
void vmm_map(pagemap_t *pm, uint64_t vaddr, uint64_t paddr, uint64_t flags);
void vmm_unmap(pagemap_t *pm, uint64_t vaddr) ;

3
kernel/src/sys/error_handling/panic.c Normal file
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@ -0,0 +1,3 @@
void panic_ctx() {
}

1603
kernel/src/sys/gfx/ssfn.h Normal file
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