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author | Jon Santmyer <jon@jonsantmyer.com> | 2024-05-22 13:00:41 -0400 |
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committer | Jon Santmyer <jon@jonsantmyer.com> | 2024-05-22 13:00:41 -0400 |
commit | ace65b453151845bc361f21f3e5b651c35f9f126 (patch) | |
tree | 262ebd29b0ca1d8584f0b6f1efa7a00d9f4f3e43 /memory/phys.c | |
parent | f004c1ade8d617a82cea2fe249434cccb47a2358 (diff) | |
download | jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.tar.gz jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.tar.bz2 jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.zip |
Diffstat (limited to 'memory/phys.c')
-rw-r--r-- | memory/phys.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/memory/phys.c b/memory/phys.c new file mode 100644 index 0000000..4d9dbc1 --- /dev/null +++ b/memory/phys.c @@ -0,0 +1,39 @@ +#include "memory.h" +#include "zone.h" +#include "jove.h" + +void +pm_reserve(physptr_t start, physptr_t end) +{ + size_t zone = pm_zone_for(start); + size_t limit = pm_zone_bound_upper(zone); + + if(end > limit) { + pm_reserve(limit, end); + end = limit; + } + pm_zone_resv(MEM_ZONE_STANDARD, start, end); +} + +void +pm_release(physptr_t start, physptr_t end) +{ + size_t zone = pm_zone_for(start); + size_t limit = pm_zone_bound_upper(zone); + + if(end > limit) { + pm_release(limit, end); + end = limit; + } + pm_zone_free(MEM_ZONE_STANDARD, start, end); +} + +physptr_t +pm_alloc(size_t pages) +{ + if(pm_zone_pages_free(MEM_ZONE_HIGHER) >= pages) + return pm_zone_alloc(MEM_ZONE_HIGHER, pages); + if(pm_zone_pages_free(MEM_ZONE_STANDARD) >= pages) + return pm_zone_alloc(MEM_ZONE_STANDARD, pages); + kpanic("Kernel ran out of physical memory!\n"); +} |