0bf74728de
Fix detection of "real mode" when /options/real-mode? doesn't exist.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_mmu): New variable
declaration.
* kern/powerpc/ieee1275/cmain.c (grub_ieee1275_mmu): New variable.
(grub_ieee1275_find_options): If `grub_ieee1275_mmu' is 0, set
`GRUB_IEEE1275_FLAG_REAL_MODE'.
(cmain): Intialize `grub_ieee1275_mmu' (using /chosen/mmu integer
property).
* kern/powerpc/ieee1275/openfw.c (grub_map): Rely on pre-initialized
`grub_ieee1275_mmu' rather than obtaining a handler on every call.
122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/* cmain.c - Startup code for the PowerPC. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2004,2005,2006,2007,2008 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <alloca.h>
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#include <stdint.h>
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#include <grub/kernel.h>
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#include <grub/misc.h>
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#include <grub/types.h>
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#include <grub/machine/kernel.h>
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#include <grub/ieee1275/ieee1275.h>
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int (*grub_ieee1275_entry_fn) (void *);
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grub_ieee1275_phandle_t grub_ieee1275_chosen;
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grub_ieee1275_ihandle_t grub_ieee1275_mmu;
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static grub_uint32_t grub_ieee1275_flags;
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int
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grub_ieee1275_test_flag (enum grub_ieee1275_flag flag)
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{
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return (grub_ieee1275_flags & (1 << flag));
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}
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void
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grub_ieee1275_set_flag (enum grub_ieee1275_flag flag)
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{
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grub_ieee1275_flags |= (1 << flag);
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}
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static void
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grub_ieee1275_find_options (void)
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{
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grub_ieee1275_phandle_t options;
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grub_ieee1275_phandle_t openprom;
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int rc;
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int realmode = 0;
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char tmp[32];
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int is_smartfirmware = 0;
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grub_ieee1275_finddevice ("/options", &options);
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rc = grub_ieee1275_get_integer_property (options, "real-mode?", &realmode,
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sizeof realmode, 0);
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if (((rc >= 0) && realmode) || (grub_ieee1275_mmu == 0))
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grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_REAL_MODE);
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grub_ieee1275_finddevice ("/openprom", &openprom);
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rc = grub_ieee1275_get_property (openprom, "CodeGen-copyright",
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tmp, sizeof (tmp), 0);
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#define SF "SmartFirmware(tm)"
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if (rc >= 0 && !grub_strncmp (tmp, SF, sizeof (SF) - 1))
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is_smartfirmware = 1;
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if (is_smartfirmware)
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{
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/* Broken in all versions */
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grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_BROKEN_OUTPUT);
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/* There are two incompatible ways of checking the version number. Try
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both. */
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rc = grub_ieee1275_get_property (openprom, "SmartFirmware-version",
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tmp, sizeof (tmp), 0);
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if (rc < 0)
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rc = grub_ieee1275_get_property (openprom, "firmware-version",
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tmp, sizeof (tmp), 0);
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if (rc >= 0)
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{
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/* It is tempting to implement a version parser to set the flags for
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e.g. 1.3 and below. However, there's a special situation here.
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3rd party updates which fix the partition bugs are common, and for
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some reason their fixes aren't being merged into trunk. So for
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example we know that 1.2 and 1.3 are broken, but there's 1.2.99
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and 1.3.99 which are known good (and applying this workaround
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would cause breakage). */
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if (!grub_strcmp (tmp, "1.0")
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|| !grub_strcmp (tmp, "1.1")
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|| !grub_strcmp (tmp, "1.2")
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|| !grub_strcmp (tmp, "1.3"))
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{
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grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_NO_PARTITION_0);
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grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_0_BASED_PARTITIONS);
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}
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}
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}
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}
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void cmain (void);
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void
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cmain (void)
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{
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grub_ieee1275_finddevice ("/chosen", &grub_ieee1275_chosen);
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if (grub_ieee1275_get_integer_property (grub_ieee1275_chosen, "mmu", &grub_ieee1275_mmu,
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sizeof grub_ieee1275_mmu, 0) < 0)
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grub_ieee1275_mmu = 0;
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grub_ieee1275_find_options ();
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/* Now invoke the main function. */
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grub_main ();
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/* Never reached. */
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}
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