mirror of https://gitee.com/openkylin/linux.git
unicore32 additional architecture files: low-level lib: misc
This patch implements the rest low-level libraries. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Acked-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
GuanXuetao
parent
77c93b2f23
commit
96cf5185a9
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/*
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* linux/arch/unicore32/include/asm/assembler.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* Do not include any C declarations in this file - it is included by
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* assembler source.
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*/
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#ifndef __ASSEMBLY__
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#error "Only include this from assembly code"
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#endif
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#include <asm/ptrace.h>
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/*
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* Little Endian independent macros for shifting bytes within registers.
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*/
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#define pull >>
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#define push <<
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#define get_byte_0 << #0
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#define get_byte_1 >> #8
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#define get_byte_2 >> #16
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#define get_byte_3 >> #24
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#define put_byte_0 << #0
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#define put_byte_1 << #8
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#define put_byte_2 << #16
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#define put_byte_3 << #24
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#define cadd cmpadd
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#define cand cmpand
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#define csub cmpsub
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#define cxor cmpxor
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/*
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* Enable and disable interrupts
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*/
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.macro disable_irq, temp
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mov \temp, asr
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andn \temp, \temp, #0xFF
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or \temp, \temp, #PSR_I_BIT | PRIV_MODE
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mov.a asr, \temp
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.endm
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.macro enable_irq, temp
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mov \temp, asr
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andn \temp, \temp, #0xFF
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or \temp, \temp, #PRIV_MODE
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mov.a asr, \temp
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.endm
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#define USER(x...) \
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9999: x; \
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.pushsection __ex_table, "a"; \
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.align 3; \
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.long 9999b, 9001f; \
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.popsection
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.macro notcond, cond, nexti = .+8
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.ifc \cond, eq
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bne \nexti
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.else; .ifc \cond, ne
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beq \nexti
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.else; .ifc \cond, ea
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bub \nexti
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.else; .ifc \cond, ub
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bea \nexti
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.else; .ifc \cond, fs
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bns \nexti
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.else; .ifc \cond, ns
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bfs \nexti
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.else; .ifc \cond, fv
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bnv \nexti
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.else; .ifc \cond, nv
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bfv \nexti
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.else; .ifc \cond, ua
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beb \nexti
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.else; .ifc \cond, eb
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bua \nexti
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.else; .ifc \cond, eg
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bsl \nexti
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.else; .ifc \cond, sl
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beg \nexti
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.else; .ifc \cond, sg
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bel \nexti
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.else; .ifc \cond, el
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bsg \nexti
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.else; .ifnc \cond, al
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.error "Unknown cond in notcond macro argument"
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.endif; .endif; .endif; .endif; .endif; .endif; .endif
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.endif; .endif; .endif; .endif; .endif; .endif; .endif
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.endif
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.endm
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.macro usracc, instr, reg, ptr, inc, cond, rept, abort
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.rept \rept
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notcond \cond, .+8
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9999 :
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.if \inc == 1
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\instr\()b.u \reg, [\ptr], #\inc
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.elseif \inc == 4
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\instr\()w.u \reg, [\ptr], #\inc
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.else
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.error "Unsupported inc macro argument"
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.endif
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.pushsection __ex_table, "a"
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.align 3
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.long 9999b, \abort
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.popsection
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.endr
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.endm
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.macro strusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f
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usracc st, \reg, \ptr, \inc, \cond, \rept, \abort
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.endm
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.macro ldrusr, reg, ptr, inc, cond = al, rept = 1, abort = 9001f
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usracc ld, \reg, \ptr, \inc, \cond, \rept, \abort
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.endm
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.macro nop8
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.rept 8
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nop
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.endr
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.endm
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@ -0,0 +1,47 @@
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/*
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* linux/arch/unicore32/include/asm/bitops.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __UNICORE_BITOPS_H__
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#define __UNICORE_BITOPS_H__
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#define find_next_bit __uc32_find_next_bit
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#define find_next_zero_bit __uc32_find_next_zero_bit
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#define find_first_bit __uc32_find_first_bit
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#define find_first_zero_bit __uc32_find_first_zero_bit
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#define _ASM_GENERIC_BITOPS_FLS_H_
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#define _ASM_GENERIC_BITOPS___FLS_H_
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#define _ASM_GENERIC_BITOPS_FFS_H_
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#define _ASM_GENERIC_BITOPS___FFS_H_
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/*
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* On UNICORE, those functions can be implemented around
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* the cntlz instruction for much better code efficiency.
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*/
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static inline int fls(int x)
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{
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int ret;
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asm("cntlz\t%0, %1" : "=r" (ret) : "r" (x) : "cc");
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ret = 32 - ret;
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return ret;
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}
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#define __fls(x) (fls(x) - 1)
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#define ffs(x) ({ unsigned long __t = (x); fls(__t & -__t); })
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#define __ffs(x) (ffs(x) - 1)
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#include <asm-generic/bitops.h>
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#endif /* __UNICORE_BITOPS_H__ */
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@ -0,0 +1,41 @@
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/*
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* linux/arch/unicore32/include/asm/checksum.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* IP checksum routines
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*/
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#ifndef __UNICORE_CHECKSUM_H__
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#define __UNICORE_CHECKSUM_H__
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/*
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* computes the checksum of the TCP/UDP pseudo-header
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* returns a 16-bit checksum, already complemented
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*/
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static inline __wsum
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csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
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unsigned short proto, __wsum sum)
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{
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__asm__(
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"add.a %0, %1, %2\n"
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"addc.a %0, %0, %3\n"
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"addc.a %0, %0, %4 << #8\n"
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"addc.a %0, %0, %5\n"
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"addc %0, %0, #0\n"
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: "=&r"(sum)
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: "r" (sum), "r" (daddr), "r" (saddr), "r" (len), "Ir" (htons(proto))
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: "cc");
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return sum;
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}
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#define csum_tcpudp_nofold csum_tcpudp_nofold
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#include <asm-generic/checksum.h>
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#endif
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/*
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* linux/arch/unicore32/include/asm/delay.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* Delay routines, using a pre-computed "loops_per_second" value.
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*/
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#ifndef __UNICORE_DELAY_H__
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#define __UNICORE_DELAY_H__
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#include <asm/param.h> /* HZ */
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extern void __delay(int loops);
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/*
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* This function intentionally does not exist; if you see references to
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* it, it means that you're calling udelay() with an out of range value.
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*
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* With currently imposed limits, this means that we support a max delay
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* of 2000us. Further limits: HZ<=1000 and bogomips<=3355
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*/
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extern void __bad_udelay(void);
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/*
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* division by multiplication: you don't have to worry about
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* loss of precision.
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*
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* Use only for very small delays ( < 1 msec). Should probably use a
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* lookup table, really, as the multiplications take much too long with
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* short delays. This is a "reasonable" implementation, though (and the
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* first constant multiplications gets optimized away if the delay is
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* a constant)
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*/
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extern void __udelay(unsigned long usecs);
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extern void __const_udelay(unsigned long);
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#define MAX_UDELAY_MS 2
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#define udelay(n) \
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(__builtin_constant_p(n) ? \
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((n) > (MAX_UDELAY_MS * 1000) ? __bad_udelay() : \
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__const_udelay((n) * ((2199023U*HZ)>>11))) : \
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__udelay(n))
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#endif /* __UNICORE_DELAY_H__ */
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/*
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* linux/arch/unicore32/include/asm/futex.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __UNICORE_FUTEX_H__
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#define __UNICORE_FUTEX_H__
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#ifdef __KERNEL__
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#include <linux/futex.h>
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#include <linux/preempt.h>
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#include <linux/uaccess.h>
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#include <linux/errno.h>
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#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
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__asm__ __volatile__( \
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"1: ldw.u %1, [%2]\n" \
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" " insn "\n" \
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"2: stw.u %0, [%2]\n" \
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" mov %0, #0\n" \
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"3:\n" \
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" .pushsection __ex_table,\"a\"\n" \
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" .align 3\n" \
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" .long 1b, 4f, 2b, 4f\n" \
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" .popsection\n" \
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" .pushsection .fixup,\"ax\"\n" \
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"4: mov %0, %4\n" \
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" b 3b\n" \
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" .popsection" \
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: "=&r" (ret), "=&r" (oldval) \
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: "r" (uaddr), "r" (oparg), "Ir" (-EFAULT) \
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: "cc", "memory")
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static inline int
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futex_atomic_op_inuser(int encoded_op, int __user *uaddr)
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{
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int op = (encoded_op >> 28) & 7;
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int cmp = (encoded_op >> 24) & 15;
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int oparg = (encoded_op << 8) >> 20;
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int cmparg = (encoded_op << 20) >> 20;
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int oldval = 0, ret;
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if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
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oparg = 1 << oparg;
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if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
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return -EFAULT;
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pagefault_disable(); /* implies preempt_disable() */
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switch (op) {
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case FUTEX_OP_SET:
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__futex_atomic_op("mov %0, %3", ret, oldval, uaddr, oparg);
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break;
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case FUTEX_OP_ADD:
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__futex_atomic_op("add %0, %1, %3", ret, oldval, uaddr, oparg);
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break;
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case FUTEX_OP_OR:
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__futex_atomic_op("or %0, %1, %3", ret, oldval, uaddr, oparg);
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break;
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case FUTEX_OP_ANDN:
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__futex_atomic_op("and %0, %1, %3",
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ret, oldval, uaddr, ~oparg);
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break;
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case FUTEX_OP_XOR:
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__futex_atomic_op("xor %0, %1, %3", ret, oldval, uaddr, oparg);
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break;
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default:
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ret = -ENOSYS;
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}
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pagefault_enable(); /* subsumes preempt_enable() */
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if (!ret) {
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switch (cmp) {
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case FUTEX_OP_CMP_EQ:
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ret = (oldval == cmparg);
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break;
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case FUTEX_OP_CMP_NE:
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ret = (oldval != cmparg);
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break;
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case FUTEX_OP_CMP_LT:
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ret = (oldval < cmparg);
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break;
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case FUTEX_OP_CMP_GE:
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ret = (oldval >= cmparg);
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break;
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case FUTEX_OP_CMP_LE:
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ret = (oldval <= cmparg);
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break;
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case FUTEX_OP_CMP_GT:
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ret = (oldval > cmparg);
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break;
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default:
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ret = -ENOSYS;
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}
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}
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return ret;
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}
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static inline int
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futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
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{
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int val;
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if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
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return -EFAULT;
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pagefault_disable(); /* implies preempt_disable() */
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__asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n"
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"1: ldw.u %0, [%3]\n"
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" cmpxor.a %0, %1\n"
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" bne 3f\n"
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"2: stw.u %2, [%3]\n"
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"3:\n"
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" .pushsection __ex_table,\"a\"\n"
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" .align 3\n"
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" .long 1b, 4f, 2b, 4f\n"
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" .popsection\n"
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" .pushsection .fixup,\"ax\"\n"
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"4: mov %0, %4\n"
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" b 3b\n"
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" .popsection"
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: "=&r" (val)
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: "r" (oldval), "r" (newval), "r" (uaddr), "Ir" (-EFAULT)
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: "cc", "memory");
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pagefault_enable(); /* subsumes preempt_enable() */
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return val;
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}
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#endif /* __KERNEL__ */
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#endif /* __UNICORE_FUTEX_H__ */
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@ -0,0 +1,52 @@
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/*
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* linux/arch/unicore32/include/asm/io.h
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||||
*
|
||||
* 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
|
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* published by the Free Software Foundation.
|
||||
*/
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#ifndef __UNICORE_IO_H__
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#define __UNICORE_IO_H__
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#ifdef __KERNEL__
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#include <asm/byteorder.h>
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#include <asm/memory.h>
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#include <asm/system.h>
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#include <asm-generic/io.h>
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/*
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* __uc32_ioremap and __uc32_ioremap_cached takes CPU physical address.
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*/
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extern void __iomem *__uc32_ioremap(unsigned long, size_t);
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extern void __iomem *__uc32_ioremap_cached(unsigned long, size_t);
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extern void __uc32_iounmap(volatile void __iomem *addr);
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/*
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* ioremap and friends.
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*
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* ioremap takes a PCI memory address, as specified in
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* Documentation/IO-mapping.txt.
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*
|
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*/
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#define ioremap(cookie, size) __uc32_ioremap(cookie, size)
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#define ioremap_cached(cookie, size) __uc32_ioremap_cached(cookie, size)
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#define iounmap(cookie) __uc32_iounmap(cookie)
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extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
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extern void ioport_unmap(void __iomem *addr);
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/*
|
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* Convert a physical pointer to a virtual kernel pointer for /dev/mem
|
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* access
|
||||
*/
|
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#undef xlate_dev_mem_ptr
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#define xlate_dev_mem_ptr(p) __va(p)
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
#endif /* __UNICORE_IO_H__ */
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
/*
|
||||
* linux/arch/unicore32/include/asm/mutex.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.
|
||||
*
|
||||
* UniCore optimized mutex locking primitives
|
||||
*
|
||||
* Please look into asm-generic/mutex-xchg.h for a formal definition.
|
||||
*/
|
||||
#ifndef __UNICORE_MUTEX_H__
|
||||
#define __UNICORE_MUTEX_H__
|
||||
|
||||
# include <asm-generic/mutex-xchg.h>
|
||||
#endif
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
#
|
||||
# linux/arch/unicore32/lib/Makefile
|
||||
#
|
||||
# Copyright (C) 2001-2010 GUAN Xue-tao
|
||||
#
|
||||
|
||||
lib-y := backtrace.o delay.o findbit.o
|
||||
lib-y += strncpy_from_user.o strnlen_user.o
|
||||
lib-y += clear_user.o copy_page.o
|
||||
lib-y += copy_from_user.o copy_to_user.o
|
||||
|
||||
GNU_LIBC_A := $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libc.a)
|
||||
GNU_LIBC_A_OBJS := memchr.o memcpy.o memmove.o memset.o
|
||||
GNU_LIBC_A_OBJS += strchr.o strrchr.o
|
||||
GNU_LIBC_A_OBJS += rawmemchr.o # needed by strrchr.o
|
||||
|
||||
GNU_LIBGCC_A := $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libgcc.a)
|
||||
GNU_LIBGCC_A_OBJS := _ashldi3.o _ashrdi3.o _lshrdi3.o
|
||||
GNU_LIBGCC_A_OBJS += _divsi3.o _modsi3.o _ucmpdi2.o _umodsi3.o _udivsi3.o
|
||||
|
||||
lib-y += $(GNU_LIBC_A_OBJS) $(GNU_LIBGCC_A_OBJS)
|
||||
|
||||
$(addprefix $(obj)/, $(GNU_LIBC_A_OBJS)):
|
||||
$(Q)$(AR) p $(GNU_LIBC_A) $(notdir $@) > $@
|
||||
|
||||
$(addprefix $(obj)/, $(GNU_LIBGCC_A_OBJS)):
|
||||
$(Q)$(AR) p $(GNU_LIBGCC_A) $(notdir $@) > $@
|
||||
|
|
@ -0,0 +1,51 @@
|
|||
/*
|
||||
* linux/arch/unicore32/lib/delay.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>
|
||||
#include <asm/param.h>
|
||||
.text
|
||||
|
||||
.LC0: .word loops_per_jiffy
|
||||
.LC1: .word (2199023*HZ)>>11
|
||||
|
||||
/*
|
||||
* r0 <= 2000
|
||||
* lpj <= 0x01ffffff (max. 3355 bogomips)
|
||||
* HZ <= 1000
|
||||
*/
|
||||
|
||||
ENTRY(__udelay)
|
||||
ldw r2, .LC1
|
||||
mul r0, r2, r0
|
||||
ENTRY(__const_udelay) @ 0 <= r0 <= 0x7fffff06
|
||||
ldw r2, .LC0
|
||||
ldw r2, [r2] @ max = 0x01ffffff
|
||||
mov r0, r0 >> #14 @ max = 0x0001ffff
|
||||
mov r2, r2 >> #10 @ max = 0x00007fff
|
||||
mul r0, r2, r0 @ max = 2^32-1
|
||||
mov.a r0, r0 >> #6
|
||||
cmoveq pc, lr
|
||||
|
||||
/*
|
||||
* loops = r0 * HZ * loops_per_jiffy / 1000000
|
||||
*
|
||||
* Oh, if only we had a cycle counter...
|
||||
*/
|
||||
|
||||
@ Delay routine
|
||||
ENTRY(__delay)
|
||||
sub.a r0, r0, #2
|
||||
bua __delay
|
||||
mov pc, lr
|
||||
ENDPROC(__udelay)
|
||||
ENDPROC(__const_udelay)
|
||||
ENDPROC(__delay)
|
||||
|
|
@ -0,0 +1,98 @@
|
|||
/*
|
||||
* linux/arch/unicore32/lib/findbit.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>
|
||||
.text
|
||||
|
||||
/*
|
||||
* Purpose : Find a 'zero' bit
|
||||
* Prototype: int find_first_zero_bit(void *addr, unsigned int maxbit);
|
||||
*/
|
||||
__uc32_find_first_zero_bit:
|
||||
cxor.a r1, #0
|
||||
beq 3f
|
||||
mov r2, #0
|
||||
1: ldb r3, [r0+], r2 >> #3
|
||||
xor.a r3, r3, #0xff @ invert bits
|
||||
bne .L_found @ any now set - found zero bit
|
||||
add r2, r2, #8 @ next bit pointer
|
||||
2: csub.a r2, r1 @ any more?
|
||||
bub 1b
|
||||
3: mov r0, r1 @ no free bits
|
||||
mov pc, lr
|
||||
|
||||
/*
|
||||
* Purpose : Find next 'zero' bit
|
||||
* Prototype: int find_next_zero_bit
|
||||
* (void *addr, unsigned int maxbit, int offset)
|
||||
*/
|
||||
ENTRY(__uc32_find_next_zero_bit)
|
||||
cxor.a r1, #0
|
||||
beq 3b
|
||||
and.a ip, r2, #7
|
||||
beq 1b @ If new byte, goto old routine
|
||||
ldb r3, [r0+], r2 >> #3
|
||||
xor r3, r3, #0xff @ now looking for a 1 bit
|
||||
mov.a r3, r3 >> ip @ shift off unused bits
|
||||
bne .L_found
|
||||
or r2, r2, #7 @ if zero, then no bits here
|
||||
add r2, r2, #1 @ align bit pointer
|
||||
b 2b @ loop for next bit
|
||||
ENDPROC(__uc32_find_next_zero_bit)
|
||||
|
||||
/*
|
||||
* Purpose : Find a 'one' bit
|
||||
* Prototype: int find_first_bit
|
||||
* (const unsigned long *addr, unsigned int maxbit);
|
||||
*/
|
||||
__uc32_find_first_bit:
|
||||
cxor.a r1, #0
|
||||
beq 3f
|
||||
mov r2, #0
|
||||
1: ldb r3, [r0+], r2 >> #3
|
||||
mov.a r3, r3
|
||||
bne .L_found @ any now set - found zero bit
|
||||
add r2, r2, #8 @ next bit pointer
|
||||
2: csub.a r2, r1 @ any more?
|
||||
bub 1b
|
||||
3: mov r0, r1 @ no free bits
|
||||
mov pc, lr
|
||||
|
||||
/*
|
||||
* Purpose : Find next 'one' bit
|
||||
* Prototype: int find_next_zero_bit
|
||||
* (void *addr, unsigned int maxbit, int offset)
|
||||
*/
|
||||
ENTRY(__uc32_find_next_bit)
|
||||
cxor.a r1, #0
|
||||
beq 3b
|
||||
and.a ip, r2, #7
|
||||
beq 1b @ If new byte, goto old routine
|
||||
ldb r3, [r0+], r2 >> #3
|
||||
mov.a r3, r3 >> ip @ shift off unused bits
|
||||
bne .L_found
|
||||
or r2, r2, #7 @ if zero, then no bits here
|
||||
add r2, r2, #1 @ align bit pointer
|
||||
b 2b @ loop for next bit
|
||||
ENDPROC(__uc32_find_next_bit)
|
||||
|
||||
/*
|
||||
* One or more bits in the LSB of r3 are assumed to be set.
|
||||
*/
|
||||
.L_found:
|
||||
rsub r1, r3, #0
|
||||
and r3, r3, r1
|
||||
cntlz r3, r3
|
||||
rsub r3, r3, #31
|
||||
add r0, r2, r3
|
||||
mov pc, lr
|
||||
|
||||
Loading…
Reference in New Issue