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ioreadXX()/ioreadXXbe() accessors are equivalent to ppc
in_leXX()/in_be16() accessors but they are not inlined.
Since commit 0eb5736828 ("powerpc/kerenl: Enable EEH for IO
accessors"), the 'le' versions are equivalent to the ones
defined in asm-generic/io.h, allthough the ones there are inlined.
Include asm-generic/io.h to get them. Keep ppc versions of the
'be' ones as they are optimised, but make them inline in ppc io.h.
This reduces the size of ppc64e_defconfig build by 3 kbytes:
text data bss dec hex filename
10160733 4343422 562972 15067127 e5e7f7 vmlinux.before
10159239 4341590 562972 15063801 e5daf9 vmlinux.after
A typical function using ioread and iowrite before the change:
c00000000066a3c4 <.ata_bmdma_stop>:
c00000000066a3c4: 7c 08 02 a6 mflr r0
c00000000066a3c8: fb c1 ff f0 std r30,-16(r1)
c00000000066a3cc: f8 01 00 10 std r0,16(r1)
c00000000066a3d0: fb e1 ff f8 std r31,-8(r1)
c00000000066a3d4: f8 21 ff 81 stdu r1,-128(r1)
c00000000066a3d8: eb e3 00 00 ld r31,0(r3)
c00000000066a3dc: eb df 00 98 ld r30,152(r31)
c00000000066a3e0: 7f c3 f3 78 mr r3,r30
c00000000066a3e4: 4b 9b 6f 7d bl c000000000021360 <.ioread8>
c00000000066a3e8: 60 00 00 00 nop
c00000000066a3ec: 7f c4 f3 78 mr r4,r30
c00000000066a3f0: 54 63 06 3c rlwinm r3,r3,0,24,30
c00000000066a3f4: 4b 9b 70 4d bl c000000000021440 <.iowrite8>
c00000000066a3f8: 60 00 00 00 nop
c00000000066a3fc: 7f e3 fb 78 mr r3,r31
c00000000066a400: 38 21 00 80 addi r1,r1,128
c00000000066a404: e8 01 00 10 ld r0,16(r1)
c00000000066a408: eb c1 ff f0 ld r30,-16(r1)
c00000000066a40c: 7c 08 03 a6 mtlr r0
c00000000066a410: eb e1 ff f8 ld r31,-8(r1)
c00000000066a414: 4b ff ff 8c b c00000000066a3a0 <.ata_sff_dma_pause>
The same function with this patch:
c000000000669cb4 <.ata_bmdma_stop>:
c000000000669cb4: e8 63 00 00 ld r3,0(r3)
c000000000669cb8: e9 43 00 98 ld r10,152(r3)
c000000000669cbc: 7c 00 04 ac hwsync
c000000000669cc0: 89 2a 00 00 lbz r9,0(r10)
c000000000669cc4: 0c 09 00 00 twi 0,r9,0
c000000000669cc8: 4c 00 01 2c isync
c000000000669ccc: 55 29 06 3c rlwinm r9,r9,0,24,30
c000000000669cd0: 7c 00 04 ac hwsync
c000000000669cd4: 99 2a 00 00 stb r9,0(r10)
c000000000669cd8: a1 4d 06 f0 lhz r10,1776(r13)
c000000000669cdc: 2c 2a 00 00 cmpdi r10,0
c000000000669ce0: 41 c2 00 08 beq- c000000000669ce8 <.ata_bmdma_stop+0x34>
c000000000669ce4: b1 4d 06 f2 sth r10,1778(r13)
c000000000669ce8: 4b ff ff a8 b c000000000669c90 <.ata_sff_dma_pause>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/18b357d68c4cde149f75c7a1031c850925cd8128.1605981539.git.christophe.leroy@csgroup.eu
32 lines
650 B
C
32 lines
650 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* ppc64 "iomap" interface implementation.
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*
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* (C) Copyright 2004 Linus Torvalds
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*/
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#include <linux/pci.h>
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#include <linux/mm.h>
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#include <linux/export.h>
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#include <asm/io.h>
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#include <asm/pci-bridge.h>
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#include <asm/isa-bridge.h>
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void __iomem *ioport_map(unsigned long port, unsigned int len)
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{
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return (void __iomem *) (port + _IO_BASE);
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}
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EXPORT_SYMBOL(ioport_map);
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#ifdef CONFIG_PCI
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void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
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{
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if (isa_vaddr_is_ioport(addr))
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return;
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if (pcibios_vaddr_is_ioport(addr))
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return;
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iounmap(addr);
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}
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EXPORT_SYMBOL(pci_iounmap);
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#endif /* CONFIG_PCI */
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