grub2/0035-coreboot-Changed-cbmemc-to-support-updated-console-f.patch
Peter Jones 6b2dd0f731 Another arm building fix.
Signed-off-by: Peter Jones <pjones@redhat.com>
2018-07-12 10:56:34 -04:00

96 lines
2.6 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Julius Werner <jwerner@chromium.org>
Date: Tue, 9 May 2017 09:03:02 +0200
Subject: [PATCH] coreboot: Changed cbmemc to support updated console format
from coreboot.
---
grub-core/term/i386/coreboot/cbmemc.c | 50 ++++++++++++++++++++++++-----------
1 file changed, 35 insertions(+), 15 deletions(-)
diff --git a/grub-core/term/i386/coreboot/cbmemc.c b/grub-core/term/i386/coreboot/cbmemc.c
index 129248c7f47..cea9b84315b 100644
--- a/grub-core/term/i386/coreboot/cbmemc.c
+++ b/grub-core/term/i386/coreboot/cbmemc.c
@@ -29,11 +29,14 @@
GRUB_MOD_LICENSE ("GPLv3+");
+#define CURSOR_MASK ((1 << 28) - 1)
+#define OVERFLOW (1 << 31)
+
struct grub_linuxbios_cbmemc
{
grub_uint32_t size;
- grub_uint32_t pointer;
- char data[0];
+ grub_uint32_t cursor;
+ char body[0];
};
static struct grub_linuxbios_cbmemc *cbmemc;
@@ -41,11 +44,20 @@ static struct grub_linuxbios_cbmemc *cbmemc;
static void
put (struct grub_term_output *term __attribute__ ((unused)), const int c)
{
+ grub_uint32_t flags, cursor;
if (!cbmemc)
return;
- if (cbmemc->pointer < cbmemc->size)
- cbmemc->data[cbmemc->pointer] = c;
- cbmemc->pointer++;
+ flags = cbmemc->cursor & ~CURSOR_MASK;
+ cursor = cbmemc->cursor & CURSOR_MASK;
+ if (cursor >= cbmemc->size)
+ return;
+ cbmemc->body[cursor++] = c;
+ if (cursor >= cbmemc->size)
+ {
+ cursor = 0;
+ flags |= OVERFLOW;
+ }
+ cbmemc->cursor = flags | cursor;
}
struct grub_terminfo_output_state grub_cbmemc_terminfo_output =
@@ -87,21 +99,29 @@ grub_cmd_cbmemc (struct grub_command *cmd __attribute__ ((unused)),
int argc __attribute__ ((unused)),
char *argv[] __attribute__ ((unused)))
{
- grub_size_t len;
- char *str;
- struct grub_linuxbios_cbmemc *cbmemc_saved;
+ grub_size_t size, cursor;
+ struct grub_linuxbios_cbmemc *real_cbmemc;
if (!cbmemc)
return grub_error (GRUB_ERR_IO, "no CBMEM console found");
- len = cbmemc->pointer;
- if (len > cbmemc->size)
- len = cbmemc->size;
- str = cbmemc->data;
- cbmemc_saved = cbmemc;
+ real_cbmemc = cbmemc;
cbmemc = 0;
- grub_xnputs (str, len);
- cbmemc = cbmemc_saved;
+ cursor = real_cbmemc->cursor & CURSOR_MASK;
+ if (!(real_cbmemc->cursor & OVERFLOW) && cursor < real_cbmemc->size)
+ size = cursor;
+ else
+ size = real_cbmemc->size;
+ if (real_cbmemc->cursor & OVERFLOW)
+ {
+ if (cursor > size)
+ cursor = 0;
+ grub_xnputs(real_cbmemc->body + cursor, size - cursor);
+ grub_xnputs(real_cbmemc->body, cursor);
+ }
+ else
+ grub_xnputs(real_cbmemc->body, size);
+ cbmemc = real_cbmemc;
return 0;
}