4 files changed, 113 insertions, 0 deletions
diff --git a/purgatory/arch/arm/Makefile b/purgatory/arch/arm/Makefile
new file mode 100644
index 0000000..690377e
--- /dev/null
+++ b/purgatory/arch/arm/Makefile
@@ -0,0 +1,9 @@
+#
+# Purgatory arm
+#
+
+arm_PURGATORY_SRCS =
+
+dist += purgatory/arch/arm/Makefile $(arm_PURGATORY_SRCS)
+
+
diff --git a/purgatory/arch/arm64/Makefile b/purgatory/arch/arm64/Makefile
new file mode 100644
index 0000000..80068ca
--- /dev/null
+++ b/purgatory/arch/arm64/Makefile
@@ -0,0 +1,19 @@
+
+arm64_PURGATORY_EXTRA_CFLAGS = \
+	-mcmodel=large \
+	-fno-PIC \
+	-fno-stack-protector \
+	-fno-asynchronous-unwind-tables \
+	-Wundef \
+	-Werror-implicit-function-declaration \
+	-Wdeclaration-after-statement \
+	-Werror=implicit-int \
+	-Werror=strict-prototypes
+
+arm64_PURGATORY_SRCS += \
+	purgatory/arch/arm64/entry.S \
+	purgatory/arch/arm64/purgatory-arm64.c
+
+dist += \
+	$(arm64_PURGATORY_SRCS) \
+	purgatory/arch/arm64/Makefile
diff --git a/purgatory/arch/arm64/entry.S b/purgatory/arch/arm64/entry.S
new file mode 100644
index 0000000..adf16f4
--- /dev/null
+++ b/purgatory/arch/arm64/entry.S
@@ -0,0 +1,51 @@
+/*
+ * ARM64 purgatory.
+ */
+
+.macro	size, sym:req
+	.size \sym, . - \sym
+.endm
+
+.text
+
+.globl purgatory_start
+purgatory_start:
+
+	adr	x19, .Lstack
+	mov	sp, x19
+
+	bl	purgatory
+
+	/* Start new image. */
+	ldr	x17, arm64_kernel_entry
+	ldr	x0, arm64_dtb_addr
+	mov	x1, xzr
+	mov	x2, xzr
+	mov	x3, xzr
+	br	x17
+
+size purgatory_start
+
+.ltorg
+
+.align 4
+	.rept	256
+	.quad	0
+	.endr
+.Lstack:
+
+.data
+
+.align 3
+
+.globl arm64_kernel_entry
+arm64_kernel_entry:
+	.quad	0
+size arm64_kernel_entry
+
+.globl arm64_dtb_addr
+arm64_dtb_addr:
+	.quad	0
+size arm64_dtb_addr
+
+.end
+\ No newline at end of file
diff --git a/purgatory/arch/arm64/purgatory-arm64.c b/purgatory/arch/arm64/purgatory-arm64.c
new file mode 100644
index 0000000..b4d8578
--- /dev/null
+++ b/purgatory/arch/arm64/purgatory-arm64.c
@@ -0,0 +1,34 @@
+/*
+ * ARM64 purgatory.
+ */
+
+#include <stdint.h>
+#include <purgatory.h>
+
+/* Symbols set by kexec. */
+
+uint8_t *arm64_sink __attribute__ ((section ("data")));
+extern void (*arm64_kernel_entry)(uint64_t, uint64_t, uint64_t, uint64_t);
+extern uint64_t arm64_dtb_addr;
+
+void putchar(int ch)
+{
+	if (!arm64_sink)
+		return;
+
+	*arm64_sink = ch;
+
+	if (ch == '\n')
+		*arm64_sink = '\r';
+}
+
+void post_verification_setup_arch(void)
+{
+	printf("purgatory: booting kernel now\n");
+}
+
+void setup_arch(void)
+{
+	printf("purgatory: entry=%lx\n", (unsigned long)arm64_kernel_entry);
+	printf("purgatory: dtb=%lx\n", arm64_dtb_addr);
+}