139 lines
4.3 KiB
Diff
139 lines
4.3 KiB
Diff
From 6002efaf14b06075755a6c552989a463c4bd8e4f Mon Sep 17 00:00:00 2001
|
|
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
|
|
Date: Thu, 28 Feb 2013 22:48:41 +0100
|
|
Subject: [PATCH 170/364] Enable linux16 on non-BIOS systems for i.a.
|
|
memtest.
|
|
|
|
* grub-core/loader/i386/pc/linux.c (grub_cmd_linux): Handle hole at 0
|
|
correctly.
|
|
* grub-core/Makefile.core.def (linux16): Enable on all x86 flavours.
|
|
---
|
|
ChangeLog | 8 ++++++
|
|
grub-core/Makefile.core.def | 6 ++--
|
|
grub-core/loader/i386/pc/linux.c | 60 ++++++++++++++++++++++++++++------------
|
|
3 files changed, 54 insertions(+), 20 deletions(-)
|
|
|
|
diff --git a/ChangeLog b/ChangeLog
|
|
index 0eb0516..135586c 100644
|
|
--- a/ChangeLog
|
|
+++ b/ChangeLog
|
|
@@ -1,5 +1,13 @@
|
|
2013-02-28 Vladimir Serbinenko <phcoder@gmail.com>
|
|
|
|
+ Enable linux16 on non-BIOS systems for i.a. memtest.
|
|
+
|
|
+ * grub-core/loader/i386/pc/linux.c (grub_cmd_linux): Handle hole at 0
|
|
+ correctly.
|
|
+ * grub-core/Makefile.core.def (linux16): Enable on all x86 flavours.
|
|
+
|
|
+2013-02-28 Vladimir Serbinenko <phcoder@gmail.com>
|
|
+
|
|
* grub-core/kern/i386/coreboot/mmap.c (grub_linuxbios_table_iterate):
|
|
Fix end of table condition.
|
|
|
|
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
|
|
index 4b0e6e6..93ff2a8 100644
|
|
--- a/grub-core/Makefile.core.def
|
|
+++ b/grub-core/Makefile.core.def
|
|
@@ -1390,9 +1390,9 @@ module = {
|
|
|
|
module = {
|
|
name = linux16;
|
|
- i386_pc = loader/i386/pc/linux.c;
|
|
- i386_pc = lib/cmdline.c;
|
|
- enable = i386_pc;
|
|
+ common = loader/i386/pc/linux.c;
|
|
+ common = lib/cmdline.c;
|
|
+ enable = x86;
|
|
};
|
|
|
|
module = {
|
|
diff --git a/grub-core/loader/i386/pc/linux.c b/grub-core/loader/i386/pc/linux.c
|
|
index 4eeb1b6..39206c8 100644
|
|
--- a/grub-core/loader/i386/pc/linux.c
|
|
+++ b/grub-core/loader/i386/pc/linux.c
|
|
@@ -79,6 +79,42 @@ grub_linux_unload (void)
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
+static int
|
|
+target_hook (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type,
|
|
+ void *data)
|
|
+{
|
|
+ grub_uint64_t *result = data;
|
|
+ grub_uint64_t candidate;
|
|
+
|
|
+ if (type != GRUB_MEMORY_AVAILABLE)
|
|
+ return 0;
|
|
+ if (addr >= 0xa0000)
|
|
+ return 0;
|
|
+ if (addr + size >= 0xa0000)
|
|
+ size = 0xa0000 - addr;
|
|
+
|
|
+ /* Put the real mode part at as a high location as possible. */
|
|
+ candidate = addr + size - (GRUB_LINUX_CL_OFFSET + maximal_cmdline_size);
|
|
+ /* But it must not exceed the traditional area. */
|
|
+ if (candidate > GRUB_LINUX_OLD_REAL_MODE_ADDR)
|
|
+ candidate = GRUB_LINUX_OLD_REAL_MODE_ADDR;
|
|
+ if (candidate < addr)
|
|
+ return 0;
|
|
+
|
|
+ if (candidate > *result || *result == (grub_uint64_t) -1)
|
|
+ *result = candidate;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static grub_addr_t
|
|
+grub_find_real_target (void)
|
|
+{
|
|
+ grub_uint64_t result = (grub_uint64_t) -1;
|
|
+
|
|
+ grub_mmap_iterate (target_hook, &result);
|
|
+ return result;
|
|
+}
|
|
+
|
|
static grub_err_t
|
|
grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
int argc, char *argv[])
|
|
@@ -141,12 +177,13 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
if (grub_le_to_cpu16 (lh.version) >= 0x0206)
|
|
maximal_cmdline_size = grub_le_to_cpu32 (lh.cmdline_size) + 1;
|
|
|
|
- /* Put the real mode part at as a high location as possible. */
|
|
- grub_linux_real_target = grub_mmap_get_lower ()
|
|
- - (GRUB_LINUX_CL_OFFSET + maximal_cmdline_size);
|
|
- /* But it must not exceed the traditional area. */
|
|
- if (grub_linux_real_target > GRUB_LINUX_OLD_REAL_MODE_ADDR)
|
|
- grub_linux_real_target = GRUB_LINUX_OLD_REAL_MODE_ADDR;
|
|
+ grub_linux_real_target = grub_find_real_target ();
|
|
+ if (grub_linux_real_target == (grub_addr_t)-1)
|
|
+ {
|
|
+ grub_error (GRUB_ERR_OUT_OF_RANGE,
|
|
+ "no appropriate low memory found");
|
|
+ goto fail;
|
|
+ }
|
|
|
|
if (grub_le_to_cpu16 (lh.version) >= 0x0201)
|
|
{
|
|
@@ -193,17 +230,6 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
goto fail;
|
|
}
|
|
|
|
- if (grub_linux_real_target + GRUB_LINUX_CL_OFFSET + maximal_cmdline_size
|
|
- > grub_mmap_get_lower ())
|
|
- {
|
|
- grub_error (GRUB_ERR_OUT_OF_RANGE,
|
|
- "too small lower memory (0x%x > 0x%x)",
|
|
- grub_linux_real_target + GRUB_LINUX_CL_OFFSET
|
|
- + maximal_cmdline_size,
|
|
- (int) grub_mmap_get_lower ());
|
|
- goto fail;
|
|
- }
|
|
-
|
|
grub_dprintf ("linux", "[Linux-%s, setup=0x%x, size=0x%x]\n",
|
|
grub_linux_is_bzimage ? "bzImage" : "zImage", real_size,
|
|
grub_linux16_prot_size);
|
|
--
|
|
1.8.1.4
|
|
|