| 28 |
|
* Page-aligned memory allocation |
| 29 |
|
*/ |
| 30 |
|
|
| 31 |
< |
// Align on page boundaries |
| 32 |
< |
static uintptr align_on_page_boundary(uintptr size) |
| 31 |
> |
// Extend size to page boundary |
| 32 |
> |
static uint32 page_extend(uint32 size) |
| 33 |
|
{ |
| 34 |
|
const uint32 page_size = getpagesize(); |
| 35 |
|
const uint32 page_mask = page_size - 1; |
| 36 |
|
return (size + page_mask) & ~page_mask; |
| 37 |
|
} |
| 38 |
|
|
| 39 |
– |
// Allocate memory on page boundary |
| 40 |
– |
static void * allocate_framebuffer(uint32 size, uint8 * hint = 0) |
| 41 |
– |
{ |
| 42 |
– |
// Remind that the system can allocate at 0x00000000... |
| 43 |
– |
return mmap((caddr_t)hint, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, zero_fd, 0); |
| 44 |
– |
} |
| 45 |
– |
|
| 39 |
|
// Screen fault handler |
| 40 |
|
static bool screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction) |
| 41 |
|
{ |
| 48 |
|
*/ |
| 49 |
|
if ((addr >= mainBuffer.memStart) && (addr < mainBuffer.memEnd)) { |
| 50 |
|
const int page = (addr - mainBuffer.memStart) >> mainBuffer.pageBits; |
| 51 |
< |
caddr_t page_ad = (caddr_t)(addr & ~(mainBuffer.pageSize - 1)); |
| 51 |
> |
caddr_t page_ad = (caddr_t)(addr & -mainBuffer.pageSize); |
| 52 |
|
LOCK_VOSF; |
| 53 |
|
PFLAG_SET(page); |
| 54 |
< |
mprotect(page_ad, mainBuffer.pageSize, PROT_READ | PROT_WRITE); |
| 54 |
> |
vm_protect((char *)page_ad, mainBuffer.pageSize, VM_PAGE_READ | VM_PAGE_WRITE); |
| 55 |
|
mainBuffer.dirty = true; |
| 56 |
|
UNLOCK_VOSF; |
| 57 |
|
return true; |
| 120 |
|
// Make the dirty pages read-only again |
| 121 |
|
const int32 offset = first_page << mainBuffer.pageBits; |
| 122 |
|
const uint32 length = (page - first_page) << mainBuffer.pageBits; |
| 123 |
< |
mprotect((caddr_t)(mainBuffer.memStart + offset), length, PROT_READ); |
| 123 |
> |
vm_protect((char *)mainBuffer.memStart + offset, length, VM_PAGE_READ); |
| 124 |
|
|
| 125 |
|
// There is at least one line to update |
| 126 |
|
const int y1 = mainBuffer.pageInfo[first_page].top; |
| 178 |
|
// Make the dirty pages read-only again |
| 179 |
|
const int32 offset = first_page << mainBuffer.pageBits; |
| 180 |
|
const uint32 length = (page - first_page) << mainBuffer.pageBits; |
| 181 |
< |
mprotect((caddr_t)(mainBuffer.memStart + offset), length, PROT_READ); |
| 181 |
> |
vm_protect((char *)mainBuffer.memStart + offset, length, VM_PAGE_READ); |
| 182 |
|
|
| 183 |
|
// I am sure that y2 >= y1 and depth != 1 |
| 184 |
|
const int y1 = mainBuffer.pageInfo[first_page].top; |
