From 5294b2a4e549f2ccb45c20bb7f498991102c56c4 Mon Sep 17 00:00:00 2001
From: mintsuki <mintsuki@protonmail.com>
Date: Thu, 1 Aug 2024 08:27:30 +0200
Subject: [PATCH] mm/vmm: Fix paging_mode_va_bits() for aarch64 4 level paging
 and loongarch64

---
 common/mm/vmm.h        | 2 +-
 common/protos/limine.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/mm/vmm.h b/common/mm/vmm.h
index f3ef4d38..842c034b 100644
--- a/common/mm/vmm.h
+++ b/common/mm/vmm.h
@@ -58,7 +58,7 @@ void map_page(pagemap_t pagemap, uint64_t virt_addr, uint64_t phys_addr, uint64_
 #define PAGING_MODE_MIN PAGING_MODE_AARCH64_4LVL
 #define PAGING_MODE_MAX PAGING_MODE_AARCH64_5LVL
 
-#define paging_mode_va_bits(mode) ((mode) ? 53 : 48)
+#define paging_mode_va_bits(mode) ((mode) ? 53 : 49)
 
 static inline uint64_t paging_mode_higher_half(int paging_mode) {
     if (paging_mode == PAGING_MODE_AARCH64_5LVL) {
diff --git a/common/protos/limine.c b/common/protos/limine.c
index 82c0519f..bc28fde0 100644
--- a/common/protos/limine.c
+++ b/common/protos/limine.c
@@ -785,7 +785,7 @@ FEAT_END
 
     uint64_t pa = aa64mmfr0 & 0xF;
 
-    uint64_t tsz = 64 - paging_mode_va_bits(paging_mode);
+    uint64_t tsz = 64 - (paging_mode_va_bits(paging_mode) - 1);
 #endif
 
     struct limine_file *kf = ext_mem_alloc(sizeof(struct limine_file));