From a2b2dbaa71278769e9dbf5ca611cd0d5f3b896ed Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Wed, 13 Mar 2024 23:30:21 -0400
Subject: kernel/amd64: machdep: Add processor_free_pcb()

Add routine to deallocate resources within the process control block.

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/arch/amd64/amd64/machdep.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'sys/arch/amd64')

diff --git a/sys/arch/amd64/amd64/machdep.c b/sys/arch/amd64/amd64/machdep.c
index 7ad3e6a..fa6c1f5 100644
--- a/sys/arch/amd64/amd64/machdep.c
+++ b/sys/arch/amd64/amd64/machdep.c
@@ -180,6 +180,19 @@ processor_init_pcb(struct proc *proc)
     return 0;
 }
 
+int
+processor_free_pcb(struct proc *proc)
+{
+    struct pcb *pcb = &proc->pcb;
+
+    if (pcb->fpu_state == NULL) {
+        return -1;
+    }
+
+    vm_free_pageframe(VIRT_TO_PHYS(pcb->fpu_state), 1);
+    return 0;
+}
+
 void
 processor_switch_to(struct proc *old_td, struct proc *new_td)
 {
-- 
cgit v1.2.3