acpi, pmm: add get_bios_ebda_addr() helper function

wipawel · wipawel · commit 4fb974263921 · 2021-07-30T17:32:09.000+02:00
Signed-off-by: Pawel Wieczorkiewicz &lt;wipawel@amazon.de&gt;
diff --git a/common/acpi.c b/common/acpi.c
@@ -103,7 +103,7 @@ static rsdp_rev1_t *acpi_find_rsdp(void) {
     uint32_t ebda_addr;
     rsdp_rev1_t *rsdp;
 
-    ebda_addr = (*(uint16_t *) paddr_to_virt_kern(EBDA_ADDR_ENTRY)) << 4;
+    ebda_addr = get_bios_ebda_addr();
     rsdp =
         find_rsdp(paddr_to_virt_kern(ebda_addr), paddr_to_virt_kern(ebda_addr + KB(1)));
     if (rsdp)
diff --git a/include/mm/pmm.h b/include/mm/pmm.h
@@ -135,6 +135,10 @@ static inline bool in_kernel_section(const void *addr) {
            (addr >= _ptr(__start_rodata) && addr < _ptr(__end_rodata));
 }
 
+static inline uint32_t get_bios_ebda_addr(void) {
+    return (*(uint16_t *) paddr_to_virt_kern(EBDA_ADDR_ENTRY)) << 4;
+}
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* KTF_PMM_H */

Original file line number	Diff line number	Diff line change
`@@ -135,6 +135,10 @@ static inline bool in_kernel_section(const void *addr) {`
`135`	`135`	`(addr >= _ptr(__start_rodata) && addr < _ptr(__end_rodata));`
`136`	`136`	`}`
`137`	`137`
	`138`	`+static inline uint32_t get_bios_ebda_addr(void) {`
	`139`	`+ return ((uint16_t ) paddr_to_virt_kern(EBDA_ADDR_ENTRY)) << 4;`
	`140`	`+}`
	`141`	`+`
`138`	`142`	`#endif /* __ASSEMBLY__ */`
`139`	`143`
`140`	`144`	`#endif /* KTF_PMM_H */`