Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/mioa701_bootresume.S b/arch/arm/mach-pxa/mioa701_bootresume.S
new file mode 100644
index 000000000..42d93f40a
--- /dev/null
+++ b/arch/arm/mach-pxa/mioa701_bootresume.S
@@ -0,0 +1,39 @@
+/* Bootloader to resume MIO A701
+ *
+ * 2007-1-12 Robert Jarzmik
+ *
+ * This code is licenced under the GPLv2.
+*/
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * Note: Yes, part of the following code is located into the .data section.
+ *       This is to allow jumpaddr to be accessed with a relative load
+ *       while we can't rely on any MMU translation.  We could have put
+ *       sleep_save_sp in the .text section as well, but some setups might
+ *       insist on it to be truly read-only.
+ */
+	.data
+	.align	2
+ENTRY(mioa701_bootstrap)
+0:
+	b	1f
+ENTRY(mioa701_jumpaddr)
+	.word	0x40f00008		@ PSPR in no-MMU mode
+1:
+	mov	r0,     #0xa0000000	@ Don't suppose memory access works
+	orr	r0, r0, #0x00200000	@ even if it's supposed to
+	orr	r0, r0, #0x0000b000
+	mov	r1, #0
+	str	r1, [r0]		@ Early disable resume for next boot
+	ldr	r0, mioa701_jumpaddr	@ (Murphy's Law)
+	ldr	r0, [r0]
+	ret	r0
+2:
+
+ENTRY(mioa701_bootstrap_lg)
+	.data
+	.align	2
+	.word	2b-0b