Started work on syscalls

1 files changed, 45 insertions, 0 deletions

diff --git a/common/uapi/mem.c b/common/uapi/mem.c
new file mode 100644
index 0000000..34ddda2
--- /dev/null
+++ b/common/uapi/mem.c
@@ -0,0 +1,45 @@
+#include <apos/uapi.h>
+#include <apos/utils.h>
+#include <apos/vmem.h>
+
+vm_t sys_req_mem(vm_t size, vm_t flags, vm_t u0, vm_t u1)
+{
+	UNUSED(u0); UNUSED(u1);
+	/* proc_tcb should give the tcb of the TID currently running */
+	struct tcb *r = cur_tcb();
+	return alloc_uvmem(r, size, flags);
+}
+
+vm_t sys_req_fixmem(vm_t start, vm_t size, vm_t flags, vm_t u0)
+{
+	UNUSED(u0);
+	struct tcb *r = cur_tcb();
+	return alloc_fixed_uvmem(r, start, size, flags);
+}
+
+vm_t sys_free_mem(vm_t start, vm_t u0, vm_t u1, vm_t u2)
+{
+	UNUSED(u0); UNUSED(u1); UNUSED(u2);
+	struct tcb *r = cur_tcb();
+	free_uvmem(r, start);
+	return 0;
+}
+
+vm_t sys_req_pmem(vm_t paddr, vm_t size, vm_t flags, vm_t u0)
+{
+	UNUSED(u0);
+	/* this will require some pondering, but essentially this syscall should
+	 * only be used for device access, so any addresses requested should be
+	 * outside the RAM area, and I'll probably have to implement some method
+	 * that keeps track of used regions outside of RAM. We'll see.
+	 */
+	return 0;
+}
+
+vm_t sys_req_sharedmem(vm_t pid, vm_t start, vm_t size, vm_t flags)
+{
+	/* take memory in PID's vaddr and map it somewhere in our own memory
+	 * region.
+	 */
+	return 0;
+}