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Message-ID: <012d01cbab3c$b180b220$14821660$@mprc.pku.edu.cn>
Date: Mon, 3 Jan 2011 19:52:27 +0800
From: "Guan Xuetao" <guanxuetao@...c.pku.edu.cn>
To: <linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCHv1 5/8] unicore32 additional architecture files: low-level lib: io
From: Guan Xuetao <guanxuetao@...c.pku.edu.cn>
Patch 5 implements low-level io libraries.
Signed-off-by: Guan Xuetao <guanxuetao@...c.pku.edu.cn>
---
arch/unicore32/include/asm/io.h | 83 +++++++++++++++++++++++++
arch/unicore32/lib/io-readsb.S | 130 +++++++++++++++++++++++++++++++++++++++
arch/unicore32/lib/io-readsl.S | 83 +++++++++++++++++++++++++
arch/unicore32/lib/io-readsw.S | 110 +++++++++++++++++++++++++++++++++
arch/unicore32/lib/io-writesb.S | 90 +++++++++++++++++++++++++++
arch/unicore32/lib/io-writesl.S | 69 +++++++++++++++++++++
arch/unicore32/lib/io-writesw.S | 87 ++++++++++++++++++++++++++
7 files changed, 652 insertions(+), 0 deletions(-)
diff --git a/arch/unicore32/include/asm/io.h b/arch/unicore32/include/asm/io.h
new file mode 100644
index 0000000..67c5c03
--- /dev/null
+++ b/arch/unicore32/include/asm/io.h
@@ -0,0 +1,83 @@
+/*
+ * linux/arch/unicore32/include/asm/io.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __UNICORE_IO_H__
+#define __UNICORE_IO_H__
+
+#ifdef __KERNEL__
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+#include <asm/memory.h>
+#include <asm/system.h>
+
+/*
+ * IO port access primitives
+ * -------------------------
+ *
+ * The UniCore doesn't have special IO access instructions; all IO is memory
+ * mapped. Note that these are defined to perform little endian accesses
+ * only. Their primary purpose is to access PCI peripherals.
+ *
+ * Note that we prevent GCC re-ordering or caching values in expressions
+ * by introducing sequence points into the in*() definitions. Note that
+ * __raw_* do not guarantee this behaviour.
+ *
+ * The {in,out}[bwl] macros are for emulating x86-style PCI IO space.
+ */
+extern void __raw_writesb(void __iomem *addr, const void *data, int bytelen);
+extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);
+extern void __raw_writesl(void __iomem *addr, const void *data, int longlen);
+
+extern void __raw_readsb(const void __iomem *addr, void *data, int bytelen);
+extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen);
+extern void __raw_readsl(const void __iomem *addr, void *data, int longlen);
+
+#define outsb(p, d, l) __raw_writesb((void __iomem *)p, d, l)
+#define outsw(p, d, l) __raw_writesw((void __iomem *)p, d, l)
+#define outsl(p, d, l) __raw_writesl((void __iomem *)p, d, l)
+
+#define insb(p, d, l) __raw_readsb((void __iomem *)p, d, l)
+#define insw(p, d, l) __raw_readsw((void __iomem *)p, d, l)
+#define insl(p, d, l) __raw_readsl((void __iomem *)p, d, l)
+
+#include <asm-generic/io.h>
+
+/*
+ * __uc32_ioremap and __uc32_ioremap_cached takes CPU physical address.
+ */
+extern void __iomem *__uc32_ioremap(unsigned long, size_t);
+extern void __iomem *__uc32_ioremap_cached(unsigned long, size_t);
+extern void __uc32_iounmap(volatile void __iomem *addr);
+
+/*
+ * ioremap and friends.
+ *
+ * ioremap takes a PCI memory address, as specified in
+ * Documentation/IO-mapping.txt.
+ *
+ */
+#define ioremap(cookie, size) __uc32_ioremap(cookie, size)
+#define ioremap_cached(cookie, size) __uc32_ioremap_cached(cookie, size)
+#define iounmap(cookie) __uc32_iounmap(cookie)
+
+extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
+extern void ioport_unmap(void __iomem *addr);
+
+/*
+ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
+ * access
+ */
+#undef xlate_dev_mem_ptr
+#define xlate_dev_mem_ptr(p) __va(p)
+
+#endif /* __KERNEL__ */
+#endif /* __UNICORE_IO_H__ */
diff --git a/arch/unicore32/lib/io-readsb.S b/arch/unicore32/lib/io-readsb.S
new file mode 100644
index 0000000..ff85be3
--- /dev/null
+++ b/arch/unicore32/lib/io-readsb.S
@@ -0,0 +1,130 @@
+/*
+ * linux/arch/unicore32/lib/io-readsb.S
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+.Linsb_align: rsub ip, ip, #4
+ csub.a ip, r2
+ cmovsg ip, r2
+ csub.a ip, #2
+ ldb r3, [r0]
+ stb.w r3, [r1]+, #1
+ bsl 201f
+ ldb r3, [r0]
+ stb.w r3, [r1]+, #1
+ bel 201f
+ ldb r3, [r0]
+ stb.w r3, [r1]+, #1
+201:
+ sub.a r2, r2, ip
+ bne .Linsb_aligned
+
+ENTRY(__raw_readsb)
+ cxor.a r2, #0 @ do we have to check for the zero len?
+ cmoveq pc, lr
+ and.a ip, r1, #3
+ bne .Linsb_align
+
+.Linsb_aligned:
+
+ sub.a r2, r2, #16
+ bfs .Linsb_no_16
+
+.Linsb_16_lp: ldb r3, [r0]
+ ldb r4, [r0]
+ ldb r5, [r0]
+ mov r3, r3 put_byte_0
+ ldb r6, [r0]
+ or r3, r3, r4 put_byte_1
+ ldb r4, [r0]
+ or r3, r3, r5 put_byte_2
+ ldb r5, [r0]
+ or r3, r3, r6 put_byte_3
+ ldb r6, [r0]
+ mov r4, r4 put_byte_0
+ ldb ip, [r0]
+ or r4, r4, r5 put_byte_1
+ ldb r5, [r0]
+ or r4, r4, r6 put_byte_2
+ ldb r6, [r0]
+ or r4, r4, ip put_byte_3
+ ldb ip, [r0]
+ mov r5, r5 put_byte_0
+ ldb r15, [r0]
+ or r5, r5, r6 put_byte_1
+ ldb r6, [r0]
+ or r5, r5, ip put_byte_2
+ ldb ip, [r0]
+ or r5, r5, r15 put_byte_3
+ ldb r15, [r0]
+ mov r6, r6 put_byte_0
+ or r6, r6, ip put_byte_1
+ ldb ip, [r0]
+ or r6, r6, r15 put_byte_2
+ or r6, r6, ip put_byte_3
+ stm.w (r3 - r6), [r1]+
+
+ sub.a r2, r2, #16
+ bns .Linsb_16_lp
+
+ cand.a r2, #15
+ cmoveq pc, lr
+
+.Linsb_no_16: cand.a r2, #8
+ beq .Linsb_no_8
+
+ ldb r3, [r0]
+ ldb r4, [r0]
+ ldb r5, [r0]
+ mov r3, r3 put_byte_0
+ ldb r6, [r0]
+ or r3, r3, r4 put_byte_1
+ ldb r4, [r0]
+ or r3, r3, r5 put_byte_2
+ ldb r5, [r0]
+ or r3, r3, r6 put_byte_3
+ ldb r6, [r0]
+ mov r4, r4 put_byte_0
+ ldb ip, [r0]
+ or r4, r4, r5 put_byte_1
+ or r4, r4, r6 put_byte_2
+ or r4, r4, ip put_byte_3
+ stm.w (r3, r4), [r1]+
+
+.Linsb_no_8: cand.a r2, #4
+ beq .Linsb_no_4
+
+ ldb r3, [r0]
+ ldb r4, [r0]
+ ldb r5, [r0]
+ ldb r6, [r0]
+ mov r3, r3 put_byte_0
+ or r3, r3, r4 put_byte_1
+ or r3, r3, r5 put_byte_2
+ or r3, r3, r6 put_byte_3
+ stw.w r3, [r1]+, #4
+
+.Linsb_no_4: and.a r2, r2, #3
+ cmoveq pc, lr
+
+ csub.a r2, #2
+ ldb r3, [r0]
+ stb.w r3, [r1]+, #1
+ bsl 201f
+ ldb r3, [r0]
+ stb.w r3, [r1]+, #1
+ bel 201f
+ ldb r3, [r0]
+ stb r3, [r1]
+201:
+ mov pc, lr
+ENDPROC(__raw_readsb)
diff --git a/arch/unicore32/lib/io-readsl.S b/arch/unicore32/lib/io-readsl.S
new file mode 100644
index 0000000..980b0fc
--- /dev/null
+++ b/arch/unicore32/lib/io-readsl.S
@@ -0,0 +1,83 @@
+/*
+ * linux/arch/unicore32/lib/io-readsl.S
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ENTRY(__raw_readsl)
+ cxor.a r2, #0 @ do we have to check for the zero len?
+ cmoveq pc, lr
+ and.a ip, r1, #3
+ bne 3f
+
+ sub.a r2, r2, #4
+ bfs 2f
+1: ldw r3, [r0+], #0
+ ldw r4, [r0+], #0
+ ldw r14, [r0+], #0
+ ldw r15, [r0+], #0
+ sub.a r2, r2, #4
+ stm.w (r3, r4, r14, r15), [r1]+
+ bns 1b
+2: mov.a r2, r2 << #31
+ bub 201f
+ ldw r3, [r0+], #0
+ ldw r14, [r0+], #0
+ stm.w (r3, r14), [r1]+
+201: beq 202f
+ ldw r3, [r0+], #0
+ stw r3, [r1+], #0
+202:
+ mov pc, lr
+
+3: ldw r3, [r0]
+ csub.a ip, #2
+ mov ip, r3 get_byte_0
+ stb.w ip, [r1]+, #1
+ bsg 6f
+ mov ip, r3 get_byte_1
+ stb.w ip, [r1]+, #1
+ beq 5f
+ mov ip, r3 get_byte_2
+ stb.w ip, [r1]+, #1
+
+4: sub.a r2, r2, #1
+ mov ip, r3 pull #24
+ beq 8f
+ ldw r3, [r0]
+ or ip, ip, r3 push #8
+ stw.w ip, [r1]+, #4
+ b 4b
+
+5: sub.a r2, r2, #1
+ mov ip, r3 pull #16
+ beq 7f
+ ldw r3, [r0]
+ or ip, ip, r3 push #16
+ stw.w ip, [r1]+, #4
+ b 5b
+
+6: sub.a r2, r2, #1
+ mov ip, r3 pull #8
+ beq 201f
+ ldw r3, [r0]
+ or ip, ip, r3 push #24
+ stw.w ip, [r1]+, #4
+ b 6b
+201:
+ mov r3, ip get_byte_2
+ stb r3, [r1+], #2
+7: mov r3, ip get_byte_1
+ stb r3, [r1+], #1
+8: mov r3, ip get_byte_0
+ stb r3, [r1+], #0
+ mov pc, lr
+ENDPROC(__raw_readsl)
diff --git a/arch/unicore32/lib/io-readsw.S b/arch/unicore32/lib/io-readsw.S
new file mode 100644
index 0000000..7d0b49d
--- /dev/null
+++ b/arch/unicore32/lib/io-readsw.S
@@ -0,0 +1,110 @@
+/*
+ * linux/arch/unicore32/lib/io-readsw.S
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ .macro pack, rd, hw1, hw2
+ or \rd, \hw1, \hw2 << #16
+ .endm
+
+.Linsw_align: mov.a ip, r1 << #31
+ bne .Linsw_noalign
+ ldh ip, [r0]
+ sub r2, r2, #1
+ sth.w ip, [r1]+, #2
+
+ENTRY(__raw_readsw)
+ cxor.a r2, #0
+ cmoveq pc, lr
+ cand.a r1, #3
+ bne .Linsw_align
+
+ sub.a r2, r2, #8
+ bfs .Lno_insw_8
+
+.Linsw_8_lp: ldh r3, [r0]
+ ldh r4, [r0]
+ pack r3, r3, r4
+
+ ldh r4, [r0]
+ ldh r5, [r0]
+ pack r4, r4, r5
+
+ ldh r5, [r0]
+ ldh ip, [r0]
+ pack r5, r5, ip
+
+ ldh ip, [r0]
+ ldh r15, [r0]
+ pack ip, ip, r15
+
+ sub.a r2, r2, #8
+ stm.w (r3 - r5), [r1]+
+ stm.w (ip), [r1]+
+ bns .Linsw_8_lp
+
+.Lno_insw_8: cand.a r2, #4
+ beq .Lno_insw_4
+
+ ldh r3, [r0]
+ ldh r4, [r0]
+ pack r3, r3, r4
+
+ ldh r4, [r0]
+ ldh ip, [r0]
+ pack r4, r4, ip
+
+ stm.w (r3, r4), [r1]+
+
+.Lno_insw_4: mov.a r2, r2 << #31
+ bub .Lno_insw_2
+
+ ldh r3, [r0]
+ ldh ip, [r0]
+ pack r3, r3, ip
+ stw.w r3, [r1]+, #4
+
+.Lno_insw_2: cmoveq pc, lr
+ ldh r3, [r0]
+ sth r3, [r1]
+ mov pc, lr
+
+.Linsw_noalign: bea 201f
+ ldb.w ip, [r1+], #-1
+ b 1f
+201:
+ ldh ip, [r0]
+ sub r2, r2, #1
+ stb.w ip, [r1]+, #1
+ mov ip, ip >> #8
+
+1: sub.a r2, r2, #2
+ bfs 3f
+
+2: ldh r3, [r0]
+ ldh r4, [r0]
+ sub.a r2, r2, #2
+ or ip, ip, r3 << #8
+ or ip, ip, r4 << #24
+ stw.w ip, [r1]+, #4
+ mov ip, r4 >> #8
+ bns 2b
+
+3: cand.a r2, #1
+ stb.w ip, [r1]+, #1
+ cmoveq pc, lr
+ ldh ip, [r0]
+ stb.w ip, [r1]+, #1
+ mov ip, ip >> #8
+ stb ip, [r1]
+ mov pc, lr
+ENDPROC(__raw_readsw)
diff --git a/arch/unicore32/lib/io-writesb.S b/arch/unicore32/lib/io-writesb.S
new file mode 100644
index 0000000..bfcb91e
--- /dev/null
+++ b/arch/unicore32/lib/io-writesb.S
@@ -0,0 +1,90 @@
+/*
+ * linux/arch/unicore32/lib/io-writesb.S
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ .macro outword, rd
+ stb \rd, [r0]
+ mov \rd, \rd >> #8
+ stb \rd, [r0]
+ mov \rd, \rd >> #8
+ stb \rd, [r0]
+ mov \rd, \rd >> #8
+ stb \rd, [r0]
+ .endm
+
+.Loutsb_align: rsub ip, ip, #4
+ csub.a ip, r2
+ cmovsg ip, r2
+ csub.a ip, #2
+ ldb.w r3, [r1]+, #1
+ stb r3, [r0]
+ bsl 201f
+ ldb.w r3, [r1]+, #1
+ stb r3, [r0]
+ bel 201f
+ ldb.w r3, [r1]+, #1
+ stb r3, [r0]
+201:
+ sub.a r2, r2, ip
+ bne .Loutsb_aligned
+
+ENTRY(__raw_writesb)
+ cxor.a r2, #0 @ do we have to check for the zero len?
+ cmoveq pc, lr
+ and.a ip, r1, #3
+ bne .Loutsb_align
+
+.Loutsb_aligned:
+
+ sub.a r2, r2, #16
+ bfs .Loutsb_no_16
+
+.Loutsb_16_lp: ldm.w (r3, r4, r5, r14), [r1]+
+ outword r3
+ outword r4
+ outword r5
+ outword r14
+ sub.a r2, r2, #16
+ bns .Loutsb_16_lp
+
+ cand.a r2, #15
+ cmoveq pc, lr
+
+.Loutsb_no_16: cand.a r2, #8
+ beq .Loutsb_no_8
+
+ ldm.w (r3, r4), [r1]+
+ outword r3
+ outword r4
+
+.Loutsb_no_8: cand.a r2, #4
+ beq .Loutsb_no_4
+
+ ldw.w r3, [r1]+, #4
+ outword r3
+
+.Loutsb_no_4: and.a r2, r2, #3
+ cmoveq pc, lr
+
+ csub.a r2, #2
+ ldb.w r3, [r1]+, #1
+ stb r3, [r0]
+ bsl 201f
+ ldb.w r3, [r1]+, #1
+ stb r3, [r0]
+ bel 201f
+ ldb r3, [r1]
+ stb r3, [r0]
+201:
+ mov pc, lr
+ENDPROC(__raw_writesb)
diff --git a/arch/unicore32/lib/io-writesl.S b/arch/unicore32/lib/io-writesl.S
new file mode 100644
index 0000000..a880b47
--- /dev/null
+++ b/arch/unicore32/lib/io-writesl.S
@@ -0,0 +1,69 @@
+/*
+ * linux/arch/unicore32/lib/io-writesl.S
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ENTRY(__raw_writesl)
+ cxor.a r2, #0 @ do we have to check for the zero len?
+ cmoveq pc, lr
+ and.a ip, r1, #3
+ bne 3f
+
+ sub.a r2, r2, #4
+ bfs 2f
+1: ldm.w (r3, r4, r14, r15), [r1]+
+ sub.a r2, r2, #4
+ stw r3, [r0+], #0
+ stw r4, [r0+], #0
+ stw r14, [r0+], #0
+ stw r15, [r0+], #0
+ bns 1b
+2: mov.a r2, r2 << #31
+ bub 201f
+ ldm.w (r3, r14), [r1]+
+ stw r3, [r0+], #0
+ stw r14, [r0+], #0
+201: cmoveq pc, lr
+ ldw r3, [r1+], #0
+ stw r3, [r0+], #0
+ mov pc, lr
+
+3: andn r1, r1, #3
+ ldw.w r3, [r1]+, #4
+ csub.a ip, #2
+ bsl 5f
+ bsg 6f
+
+4: mov ip, r3 pull #16
+ ldw.w r3, [r1]+, #4
+ sub.a r2, r2, #1
+ or ip, ip, r3 push #16
+ stw ip, [r0]
+ bne 4b
+ mov pc, lr
+
+5: mov ip, r3 pull #8
+ ldw.w r3, [r1]+, #4
+ sub.a r2, r2, #1
+ or ip, ip, r3 push #24
+ stw ip, [r0]
+ bne 5b
+ mov pc, lr
+
+6: mov ip, r3 pull #24
+ ldw.w r3, [r1]+, #4
+ sub.a r2, r2, #1
+ or ip, ip, r3 push #8
+ stw ip, [r0]
+ bne 6b
+ mov pc, lr
+ENDPROC(__raw_writesl)
diff --git a/arch/unicore32/lib/io-writesw.S b/arch/unicore32/lib/io-writesw.S
new file mode 100644
index 0000000..23e1f16
--- /dev/null
+++ b/arch/unicore32/lib/io-writesw.S
@@ -0,0 +1,87 @@
+/*
+ * linux/arch/unicore32/lib/io-writesw.S
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ .macro outword, rd
+ sth \rd, [r0]
+ mov \rd, \rd >> #16
+ sth \rd, [r0]
+ .endm
+
+.Loutsw_align: mov.a ip, r1 << #31
+ bne .Loutsw_noalign
+
+ ldh.w r3, [r1]+, #2
+ sub r2, r2, #1
+ sth r3, [r0]
+
+ENTRY(__raw_writesw)
+ cxor.a r2, #0
+ cmoveq pc, lr
+ and.a r3, r1, #3
+ bne .Loutsw_align
+
+ sub.a r2, r2, #8
+ bfs .Lno_outsw_8
+
+.Loutsw_8_lp: ldm.w (r3, r4, r5, r14), [r1]+
+ sub.a r2, r2, #8
+ outword r3
+ outword r4
+ outword r5
+ outword r14
+ bns .Loutsw_8_lp
+
+.Lno_outsw_8: cand.a r2, #4
+ beq .Lno_outsw_4
+
+ ldm.w (r3, r14), [r1]+
+ outword r3
+ outword r14
+
+.Lno_outsw_4: mov.a r2, r2 << #31
+ bub .Lno_outsw_2
+
+ ldw.w r3, [r1]+, #4
+ outword r3
+
+.Lno_outsw_2: cmoveq pc, lr
+ ldh r3, [r1]
+ sth r3, [r0]
+
+ mov pc, lr
+
+.Loutsw_noalign:
+ ldw.w r3, [r1-], r3
+ bub 201f
+ sub r2, r2, #1
+ b 2f
+201:
+ sub.a r2, r2, #2
+ bfs 3f
+
+1: mov ip, r3 >> #8
+ sth ip, [r0]
+2: mov ip, r3 >> #24
+ ldw.w r3, [r1+], #4
+ sub.a r2, r2, #2
+ or ip, ip, r3 << #8
+ sth ip, [r0]
+ bns 1b
+
+ cand.a r2, #1
+3: cmoveq pc, lr
+ mov ip, r3 >> #8
+ sth ip, [r0]
+ mov pc, lr
+ENDPROC(__raw_writesw)
--
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