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kernel/vm: Clean up vm_allocate_early_physical_page.

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Clean up comments, merge assignments with declarations, etc.
No functional change intended.
This commit is contained in:
Augustin Cavalier 2024-10-09 23:42:37 -04:00
parent b1e579c6f1
commit 27d0a861e0
1 changed files with 13 additions and 16 deletions
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29
src/system/kernel/vm/vm.cpp
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@ -4341,19 +4341,18 @@ vm_allocate_early_physical_page(kernel_args* args)
return 0;
}
// Try expanding the existing physical ranges upwards.
for (uint32 i = 0; i < args->num_physical_allocated_ranges; i++) {
phys_addr_t nextPage;
nextPage = args->physical_allocated_range[i].start
phys_addr_t nextPage = args->physical_allocated_range[i].start
+ args->physical_allocated_range[i].size;
// see if the page after the next allocated paddr run can be allocated
if (i + 1 < args->num_physical_allocated_ranges
&& args->physical_allocated_range[i + 1].size != 0) {
// see if the next page will collide with the next allocated range
if (nextPage >= args->physical_allocated_range[i+1].start)
// make sure the next page does not collide with the next allocated range
if ((i + 1) < args->num_physical_allocated_ranges
&& args->physical_allocated_range[i + 1].size != 0) {
if (nextPage >= args->physical_allocated_range[i + 1].start)
continue;
}
// see if the next physical page fits in the memory block
// see if the next page fits in the memory block
if (is_page_in_physical_memory_range(args, nextPage)) {
// we got one!
args->physical_allocated_range[i].size += B_PAGE_SIZE;
@ -4363,14 +4362,12 @@ vm_allocate_early_physical_page(kernel_args* args)
// Expanding upwards didn't work, try going downwards.
for (uint32 i = 0; i < args->num_physical_allocated_ranges; i++) {
phys_addr_t nextPage;
phys_addr_t nextPage = args->physical_allocated_range[i].start - B_PAGE_SIZE;
nextPage = args->physical_allocated_range[i].start - B_PAGE_SIZE;
// see if the page after the prev allocated paddr run can be allocated
if (i > 0 && args->physical_allocated_range[i - 1].size != 0) {
// see if the next page will collide with the next allocated range
if (nextPage < args->physical_allocated_range[i-1].start
+ args->physical_allocated_range[i-1].size)
// make sure the next page does not collide with the previous allocated range
if ((i > 0) && args->physical_allocated_range[i - 1].size != 0) {
if (nextPage < args->physical_allocated_range[i - 1].start
+ args->physical_allocated_range[i - 1].size)
continue;
}
// see if the next physical page fits in the memory block