![Paul Gortmaker](/assets/img/avatar_default.png)
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. In the case of some code where it is modular, we can extend that to also include files that are building basic support functionality but not related to loading or registering the final module; such files also have no need whatsoever for module.h The advantage in removing such instances is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h might have been the implicit source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each instance for the presence of either and replace/add as needed. Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code. Build coverage of all the mips defconfigs revealed the module.h header was masking a couple of implicit include instances, so we add the appropriate headers there. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: David Daney <david.daney@cavium.com> Cc: John Crispin <john@phrozen.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "Steven J. Hill" <steven.hill@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15131/ [james.hogan@imgtec.com: Preserve sort order where it already exists] Signed-off-by: James Hogan <james.hogan@imgtec.com>
93 lines
2 KiB
C
93 lines
2 KiB
C
/*
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* Setup the right wbflush routine for the different DECstations.
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*
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* Created with information from:
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* DECstation 3100 Desktop Workstation Functional Specification
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* DECstation 5000/200 KN02 System Module Functional Specification
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* mipsel-linux-objdump --disassemble vmunix | grep "wbflush" :-)
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1998 Harald Koerfgen
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* Copyright (C) 2002 Maciej W. Rozycki
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*/
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#include <linux/export.h>
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#include <linux/init.h>
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#include <asm/bootinfo.h>
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#include <asm/wbflush.h>
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#include <asm/barrier.h>
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static void wbflush_kn01(void);
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static void wbflush_kn210(void);
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static void wbflush_mips(void);
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void (*__wbflush) (void);
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void __init wbflush_setup(void)
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{
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switch (mips_machtype) {
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case MACH_DS23100:
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case MACH_DS5000_200: /* DS5000 3max */
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__wbflush = wbflush_kn01;
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break;
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case MACH_DS5100: /* DS5100 MIPSMATE */
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__wbflush = wbflush_kn210;
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break;
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case MACH_DS5000_1XX: /* DS5000/100 3min */
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case MACH_DS5000_XX: /* Personal DS5000/2x */
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case MACH_DS5000_2X0: /* DS5000/240 3max+ */
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case MACH_DS5900: /* DS5900 bigmax */
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default:
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__wbflush = wbflush_mips;
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break;
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}
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}
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/*
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* For the DS3100 and DS5000/200 the R2020/R3220 writeback buffer functions
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* as part of Coprocessor 0.
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*/
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static void wbflush_kn01(void)
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{
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asm(".set\tpush\n\t"
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".set\tnoreorder\n\t"
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"1:\tbc0f\t1b\n\t"
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"nop\n\t"
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".set\tpop");
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}
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/*
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* For the DS5100 the writeback buffer seems to be a part of Coprocessor 3.
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* But CP3 has to enabled first.
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*/
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static void wbflush_kn210(void)
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{
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asm(".set\tpush\n\t"
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".set\tnoreorder\n\t"
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"mfc0\t$2,$12\n\t"
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"lui\t$3,0x8000\n\t"
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"or\t$3,$2,$3\n\t"
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"mtc0\t$3,$12\n\t"
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"nop\n"
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"1:\tbc3f\t1b\n\t"
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"nop\n\t"
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"mtc0\t$2,$12\n\t"
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"nop\n\t"
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".set\tpop"
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: : : "$2", "$3");
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}
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/*
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* I/O ASIC systems use a standard writeback buffer that gets flushed
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* upon an uncached read.
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*/
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static void wbflush_mips(void)
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{
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__fast_iob();
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}
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EXPORT_SYMBOL(__wbflush);
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