Module Name: src
Committed By: jmcneill
Date: Fri Sep 7 17:30:32 UTC 2018
Modified Files:
src/sys/stand/efiboot: efiboot_machdep.h
src/sys/stand/efiboot/bootaa64: cache.S efibootaa64.c
Log Message:
Disable MMU and dcache before jumping to the kernel.
To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/stand/efiboot/efiboot_machdep.h
cvs rdiff -u -r1.1 -r1.2 src/sys/stand/efiboot/bootaa64/cache.S \
src/sys/stand/efiboot/bootaa64/efibootaa64.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/stand/efiboot/efiboot_machdep.h
diff -u src/sys/stand/efiboot/efiboot_machdep.h:1.1 src/sys/stand/efiboot/efiboot_machdep.h:1.2
--- src/sys/stand/efiboot/efiboot_machdep.h:1.1 Fri Aug 24 02:01:06 2018
+++ src/sys/stand/efiboot/efiboot_machdep.h Fri Sep 7 17:30:32 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: efiboot_machdep.h,v 1.1 2018/08/24 02:01:06 jmcneill Exp $ */
+/* $NetBSD: efiboot_machdep.h,v 1.2 2018/09/07 17:30:32 jmcneill Exp $ */
/*-
* Copyright (c) 2018 Jared McNeill <jmcne...@invisible.ca>
@@ -30,4 +30,5 @@
#define EFIBOOT_ALIGN 0
#endif
+void efi_dcache_flush(u_long, u_long);
void efi_boot_kernel(u_long[]);
Index: src/sys/stand/efiboot/bootaa64/cache.S
diff -u src/sys/stand/efiboot/bootaa64/cache.S:1.1 src/sys/stand/efiboot/bootaa64/cache.S:1.2
--- src/sys/stand/efiboot/bootaa64/cache.S:1.1 Fri Aug 24 02:01:06 2018
+++ src/sys/stand/efiboot/bootaa64/cache.S Fri Sep 7 17:30:32 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: cache.S,v 1.1 2018/08/24 02:01:06 jmcneill Exp $ */
+/* $NetBSD: cache.S,v 1.2 2018/09/07 17:30:32 jmcneill Exp $ */
/*-
* Copyright (c) 2014 Robin Randhawa
@@ -34,6 +34,9 @@
#include <aarch64/asm.h>
+#define SCTLR_M (1<<0)
+#define SCTLR_C (1<<2)
+
.text
.align 2
@@ -96,3 +99,40 @@ ENTRY(aarch64_icache_inv_all)
isb
ret
END(aarch64_icache_inv_all)
+
+/*
+ * void aarch64_exec_kernel(paddr_t entry, paddr_t dtb)
+ */
+ENTRY(aarch64_exec_kernel)
+ mov x20, x0 /* kernel entry point */
+ mov x21, x1 /* dtb address */
+
+ mrs x0, CurrentEL
+ lsr x0, x0, #2
+ cmp x0, #0x2
+ b.eq 1f
+
+ /* Disable MMU and dcache, CurrentEL = EL1 */
+ mrs x0, sctlr_el1
+ bic x0, x0, #SCTLR_M
+ bic x0, x0, #SCTLR_C
+ msr sctlr_el1, x0
+ isb
+ b 2f
+1:
+ /* Disable MMU and dcache, CurrentEL = EL2 */
+ mrs x0, sctlr_el2
+ bic x0, x0, #SCTLR_M
+ bic x0, x0, #SCTLR_C
+ msr sctlr_el2, x0
+ isb
+2:
+
+ /* Jump to kernel */
+ mov x0, x21
+ mov x1, xzr
+ mov x2, xzr
+ mov x3, xzr
+ br x20
+
+END(aarch64_exec_kernel)
Index: src/sys/stand/efiboot/bootaa64/efibootaa64.c
diff -u src/sys/stand/efiboot/bootaa64/efibootaa64.c:1.1 src/sys/stand/efiboot/bootaa64/efibootaa64.c:1.2
--- src/sys/stand/efiboot/bootaa64/efibootaa64.c:1.1 Fri Aug 24 02:01:06 2018
+++ src/sys/stand/efiboot/bootaa64/efibootaa64.c Fri Sep 7 17:30:32 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: efibootaa64.c,v 1.1 2018/08/24 02:01:06 jmcneill Exp $ */
+/* $NetBSD: efibootaa64.c,v 1.2 2018/09/07 17:30:32 jmcneill Exp $ */
/*-
* Copyright (c) 2016 Kimihiro Nonaka <non...@netbsd.org>
@@ -36,6 +36,13 @@
/* cache.S */
void aarch64_dcache_wbinv_range(vaddr_t, vsize_t);
void aarch64_icache_inv_all(void);
+void aarch64_exec_kernel(paddr_t, paddr_t);
+
+void
+efi_dcache_flush(u_long start, u_long size)
+{
+ aarch64_dcache_wbinv_range(start, size);
+}
void
efi_boot_kernel(u_long marks[MARK_MAX])
@@ -51,5 +58,5 @@ efi_boot_kernel(u_long marks[MARK_MAX])
aarch64_dcache_wbinv_range((u_long)efi_fdt_data(), efi_fdt_size());
aarch64_icache_inv_all();
- kernel_entry((register_t)efi_fdt_data(), 0, 0, 0);
+ aarch64_exec_kernel((paddr_t)marks[MARK_ENTRY], (paddr_t)efi_fdt_data());
}
