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From 04a2b7bb55bfee0495cc39796846adf8d6a313bc Mon Sep 17 00:00:00 2001
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Message-Id: <04a2b7bb55bfee0495cc39796846adf8d6a313bc.1430751022.git.panand@redhat.com>
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In-Reply-To: <8b40614f4c1925fe94f274dfc69d1a63537fe399.1430751022.git.panand@redhat.com>
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References: <8b40614f4c1925fe94f274dfc69d1a63537fe399.1430751022.git.panand@redhat.com>
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From: Pratyush Anand <panand@redhat.com>
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Date: Mon, 4 May 2015 17:47:14 +0530
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Subject: [PATCH 2/3] arm64: Pass RAM boundary to purgatory
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RAM boundary which includes all the sections is needed for creating
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identity page mapping and to enable d-cache for those areas.
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Signed-off-by: Pratyush Anand <panand@redhat.com>
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---
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kexec/arch/arm64/include/types.h | 16 ++++++++++++++++
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kexec/arch/arm64/kexec-arm64.c | 16 +++++++++++++++-
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purgatory/arch/arm64/entry.S | 10 ++++++++++
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3 files changed, 41 insertions(+), 1 deletion(-)
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create mode 100644 kexec/arch/arm64/include/types.h
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diff --git a/kexec/arch/arm64/include/types.h b/kexec/arch/arm64/include/types.h
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new file mode 100644
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index 000000000000..08f833a6d585
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--- /dev/null
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+++ b/kexec/arch/arm64/include/types.h
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@@ -0,0 +1,16 @@
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+#ifndef _TYPES_H_
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+#define _TYPES_H_
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+
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+#define min(x,y) ({ \
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+ typeof(x) _x = (x); \
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+ typeof(y) _y = (y); \
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+ (void) (&_x == &_y); \
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+ _x < _y ? _x : _y; })
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+
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+#define max(x,y) ({ \
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+ typeof(x) _x = (x); \
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+ typeof(y) _y = (y); \
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+ (void) (&_x == &_y); \
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+ _x > _y ? _x : _y; })
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+
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+#endif /* _TYPES_H_ */
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diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c
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index 12c589f8001c..8ce4a61fc9c2 100644
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--- a/kexec/arch/arm64/kexec-arm64.c
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+++ b/kexec/arch/arm64/kexec-arm64.c
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@@ -28,6 +28,7 @@
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#include "fs2dt.h"
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#include "kexec-syscall.h"
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#include "arch/options.h"
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+#include "types.h"
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/* Global varables the core kexec routines expect. */
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@@ -588,9 +589,11 @@ static uint64_t read_sink(const char *command_line)
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int arm64_load_other_segments(struct kexec_info *info,
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unsigned long kernel_entry, char *option)
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{
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- int result;
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+ int result, i;
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struct mem_ehdr ehdr;
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unsigned long dtb_base;
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+ unsigned long arm64_ram_start = -1;
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+ unsigned long arm64_ram_end = 0;
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unsigned long hole_min, hole_max;
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char *initrd_buf = NULL;
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uint64_t purgatory_sink;
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@@ -720,6 +723,17 @@ int arm64_load_other_segments(struct kexec_info *info,
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elf_rel_set_symbol(&info->rhdr, "arm64_dtb_addr", &dtb_base,
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sizeof(dtb_base));
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+ for (i = 0; i < info->nr_segments; i++) {
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+ arm64_ram_start = min(arm64_ram_start,
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+ (unsigned long)info->segment[i].mem);
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+ arm64_ram_end = max(arm64_ram_end,
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+ ((unsigned long)info->segment[i].mem +
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+ info->segment[i].memsz));
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+ }
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+ elf_rel_set_symbol(&info->rhdr, "arm64_ram_start",
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+ &arm64_ram_start, sizeof(arm64_ram_start));
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+ elf_rel_set_symbol(&info->rhdr, "arm64_ram_end",
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+ &arm64_ram_end, sizeof(arm64_ram_end));
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}
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return 0;
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diff --git a/purgatory/arch/arm64/entry.S b/purgatory/arch/arm64/entry.S
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index 140e91d87ab1..0713ccdec4ad 100644
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--- a/purgatory/arch/arm64/entry.S
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+++ b/purgatory/arch/arm64/entry.S
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@@ -52,3 +52,13 @@ size arm64_kernel_entry
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arm64_dtb_addr:
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.quad 0
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size arm64_dtb_addr
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+
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+.globl arm64_ram_start
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+arm64_ram_start:
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+ .quad 0
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+size arm64_ram_start
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+
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+.globl arm64_ram_end
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+arm64_ram_end:
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+ .quad 0
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+size arm64_ram_end
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--
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2.1.0
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