[PATCH v2 01/19] i386/memory: Define GRUB_PAGE_MASK and GRUB_PAGE_{UP, DOWN} macros

[Sergii Dmytruk]

From: Krystian Hebel <krystian.hebel@3mdeb.com>

GRUB_PAGE_MASK is intentionally signed to make use of sign extension.

Subsequent patches will use them.

Signed-off-by: Krystian Hebel <krystian.hebel@3mdeb.com>
Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
Reviewed-by: Ross Philipson <ross.philipson@oracle.com>
---
 include/grub/i386/memory.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/grub/i386/memory.h b/include/grub/i386/memory.h
index c64529630..ca4509497 100644
--- a/include/grub/i386/memory.h
+++ b/include/grub/i386/memory.h
@@ -22,6 +22,7 @@
 
 #define GRUB_PAGE_SHIFT                12
 #define GRUB_PAGE_SIZE         (1UL << GRUB_PAGE_SHIFT)
+#define GRUB_PAGE_MASK         (~((1L << GRUB_PAGE_SHIFT) - 1))
 
 /* The flag for protected mode.  */
 #define GRUB_MEMORY_CPU_CR0_PE_ON              0x1
@@ -43,8 +44,12 @@
 
 #define GRUB_MMAP_MALLOC_LOW 1
 
+#include <grub/misc.h>
 #include <grub/types.h>
 
+#define GRUB_PAGE_UP(p)                ALIGN_UP (p, GRUB_PAGE_SIZE)
+#define GRUB_PAGE_DOWN(p)      ALIGN_DOWN (p, GRUB_PAGE_SIZE)
+
 struct grub_e820_mmap_entry
 {
   grub_uint64_t addr;
-- 
2.47.0