8eed92ec3a
This version of coreboot successfully starts a Harvey (Plan 9) kernel as a payload, entering main() with no supporting assembly code for startup. The Harvey port is not complete so it just panics but ... it gets started. We provide a standard payload function that takes a pointer argument and makes the jump from machine to supervisor mode; the days of kernels running in machine mode are over. We do some small tweaks to the virtual memory code. We temporarily disable two functions that won't work on some targets as register numbers changed between 1.7 and 1.9. Once lowrisc catches up we'll reenable them. We add the PAGETABLES to the memlayout.ld and use _pagetables in the virtual memory setup code. We now use the _stack and _estack from memlayout so we know where things are. As time goes on maybe we can kill all the magic numbers. BUG=None BRANCH=None TEST=None Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: https://review.coreboot.org/17058 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh <furquan@google.com> Change-Id: I6caadfa9627fa35e31580492be01d4af908d31d9 Reviewed-on: https://chromium-review.googlesource.com/402383 Commit-Ready: Furquan Shaikh <furquan@chromium.org> Tested-by: Furquan Shaikh <furquan@chromium.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2014 Google Inc.
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*
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* This program 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; version 2 of the License.
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*
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* This program 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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#ifndef __SYMBOLS_H
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#define __SYMBOLS_H
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#include <types.h>
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extern u8 _sram[];
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extern u8 _esram[];
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#define _sram_size (_esram - _sram)
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extern u8 _dram[];
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extern u8 _timestamp[];
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extern u8 _etimestamp[];
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#define _timestamp_size (_etimestamp - _timestamp)
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extern u8 _preram_cbmem_console[];
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extern u8 _epreram_cbmem_console[];
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#define _preram_cbmem_console_size \
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(_epreram_cbmem_console - _preram_cbmem_console)
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extern u8 _cbmem_init_hooks[];
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extern u8 _ecbmem_init_hooks[];
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#define _cbmem_init_hooks_size (_ecbmem_init_hooks - _cbmem_init_hooks)
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extern u8 _stack[];
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extern u8 _estack[];
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#define _stack_size (_estack - _stack)
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extern u8 _pagetables[];
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extern u8 _epagetables[];
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#define _pagetables_size (_epagetables - _pagetables)
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extern u8 _preram_cbfs_cache[];
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extern u8 _epreram_cbfs_cache[];
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#define _preram_cbfs_cache_size (_epreram_cbfs_cache - _preram_cbfs_cache)
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extern u8 _postram_cbfs_cache[];
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extern u8 _epostram_cbfs_cache[];
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#define _postram_cbfs_cache_size (_epostram_cbfs_cache - _postram_cbfs_cache)
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extern u8 _cbfs_cache[];
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extern u8 _ecbfs_cache[];
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#define _cbfs_cache_size (_ecbfs_cache - _cbfs_cache)
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extern u8 _payload[];
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extern u8 _epayload[];
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#define _payload_size (_epayload - _payload)
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/* "program" always refers to the current execution unit. */
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extern u8 _program[];
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extern u8 _eprogram[];
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#define _program_size (_eprogram - _program)
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/* _<stage>_size is always the maximum amount allocated in memlayout, whereas
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* _program_size gives the actual memory footprint *used* by current stage. */
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extern u8 _bootblock[];
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extern u8 _ebootblock[];
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#define _bootblock_size (_ebootblock - _bootblock)
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extern u8 _romstage[];
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extern u8 _eromstage[];
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#define _romstage_size (_eromstage - _romstage)
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extern u8 _ramstage[];
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extern u8 _eramstage[];
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#define _ramstage_size (_eramstage - _ramstage)
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extern u8 _verstage[];
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extern u8 _everstage[];
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#define _verstage_size (_everstage - _verstage)
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/* Arch-specific, move to <arch/symbols.h> if they become too many. */
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extern u8 _ttb[];
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extern u8 _ettb[];
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#define _ttb_size (_ettb - _ttb)
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extern u8 _ttb_subtables[];
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extern u8 _ettb_subtables[];
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#define _ttb_subtables_size (_ettb_subtables - _ttb_subtables)
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extern u8 _dma_coherent[];
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extern u8 _edma_coherent[];
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#define _dma_coherent_size (_edma_coherent - _dma_coherent)
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extern u8 _soc_registers[];
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extern u8 _esoc_registers[];
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#define _soc_registers_size (_esoc_registers - _soc_registers)
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extern u8 _framebuffer[];
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extern u8 _eframebuffer[];
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#define _framebuffer_size (_eframebuffer - _framebuffer)
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/* Put this into a .c file accessing a linker script region to mark that region
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* as "optional". If it is defined in memlayout.ld (or anywhere else), the
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* values from that definition will be used. If not, start, end and size will
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* all evaluate to 0. (We can't explicitly assign the symbols to 0 in the
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* assembly due to https://sourceware.org/bugzilla/show_bug.cgi?id=1038.) */
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#define DECLARE_OPTIONAL_REGION(name) asm (".weak _" #name ", _e" #name )
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#endif /* __SYMBOLS_H */
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