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98 lines
2.7 KiB
Diff
98 lines
2.7 KiB
Diff
From 70b555a52a065b2beb91e6fc97a6b358c931b303 Mon Sep 17 00:00:00 2001
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From: Julius Werner <jwerner@chromium.org>
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Date: Tue, 9 May 2017 09:03:02 +0200
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Subject: [PATCH 035/192] coreboot: Changed cbmemc to support updated console
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format from coreboot.
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---
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grub-core/term/i386/coreboot/cbmemc.c | 50 ++++++++++++++++++++++++-----------
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1 file changed, 35 insertions(+), 15 deletions(-)
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diff --git a/grub-core/term/i386/coreboot/cbmemc.c b/grub-core/term/i386/coreboot/cbmemc.c
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index 129248c7f..cea9b8431 100644
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--- a/grub-core/term/i386/coreboot/cbmemc.c
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+++ b/grub-core/term/i386/coreboot/cbmemc.c
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@@ -29,11 +29,14 @@
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GRUB_MOD_LICENSE ("GPLv3+");
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+#define CURSOR_MASK ((1 << 28) - 1)
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+#define OVERFLOW (1 << 31)
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+
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struct grub_linuxbios_cbmemc
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{
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grub_uint32_t size;
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- grub_uint32_t pointer;
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- char data[0];
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+ grub_uint32_t cursor;
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+ char body[0];
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};
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static struct grub_linuxbios_cbmemc *cbmemc;
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@@ -41,11 +44,20 @@ static struct grub_linuxbios_cbmemc *cbmemc;
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static void
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put (struct grub_term_output *term __attribute__ ((unused)), const int c)
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{
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+ grub_uint32_t flags, cursor;
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if (!cbmemc)
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return;
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- if (cbmemc->pointer < cbmemc->size)
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- cbmemc->data[cbmemc->pointer] = c;
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- cbmemc->pointer++;
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+ flags = cbmemc->cursor & ~CURSOR_MASK;
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+ cursor = cbmemc->cursor & CURSOR_MASK;
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+ if (cursor >= cbmemc->size)
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+ return;
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+ cbmemc->body[cursor++] = c;
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+ if (cursor >= cbmemc->size)
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+ {
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+ cursor = 0;
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+ flags |= OVERFLOW;
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+ }
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+ cbmemc->cursor = flags | cursor;
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}
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struct grub_terminfo_output_state grub_cbmemc_terminfo_output =
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@@ -87,21 +99,29 @@ grub_cmd_cbmemc (struct grub_command *cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char *argv[] __attribute__ ((unused)))
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{
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- grub_size_t len;
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- char *str;
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- struct grub_linuxbios_cbmemc *cbmemc_saved;
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+ grub_size_t size, cursor;
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+ struct grub_linuxbios_cbmemc *real_cbmemc;
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if (!cbmemc)
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return grub_error (GRUB_ERR_IO, "no CBMEM console found");
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- len = cbmemc->pointer;
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- if (len > cbmemc->size)
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- len = cbmemc->size;
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- str = cbmemc->data;
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- cbmemc_saved = cbmemc;
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+ real_cbmemc = cbmemc;
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cbmemc = 0;
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- grub_xnputs (str, len);
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- cbmemc = cbmemc_saved;
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+ cursor = real_cbmemc->cursor & CURSOR_MASK;
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+ if (!(real_cbmemc->cursor & OVERFLOW) && cursor < real_cbmemc->size)
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+ size = cursor;
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+ else
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+ size = real_cbmemc->size;
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+ if (real_cbmemc->cursor & OVERFLOW)
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+ {
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+ if (cursor > size)
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+ cursor = 0;
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+ grub_xnputs(real_cbmemc->body + cursor, size - cursor);
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+ grub_xnputs(real_cbmemc->body, cursor);
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+ }
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+ else
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+ grub_xnputs(real_cbmemc->body, size);
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+ cbmemc = real_cbmemc;
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return 0;
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}
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--
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2.13.4
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