diff options
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"); +} |