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Viewing changes to arch/unicore32/kernel/debug-macro.S

  • Committer: Bazaar Package Importer
  • Author(s): Paolo Pisati
  • Date: 2011-06-29 15:23:51 UTC
  • mfrom: (26.1.1 natty-proposed)
  • Revision ID: james.westby@ubuntu.com-20110629152351-xs96tm303d95rpbk
Tags: 3.0.0-1200.2
* Rebased against 3.0.0-6.7
* BSP from TI based on 3.0.0

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arch/unicore32/kernel/debug-macro.S
 
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/*
 
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 * linux/arch/unicore32/kernel/debug-macro.S
 
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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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 * Debugging macro include header
 
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 */
 
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#include <generated/asm-offsets.h>
 
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#include <mach/hardware.h>
 
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                .macro  put_word_ocd, rd, rx=r16
 
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1001:           movc            \rx, p1.c0, #0
 
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                cand.a  \rx, #2
 
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                bne     1001b
 
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                movc            p1.c1, \rd, #1
 
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                .endm
 
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#ifdef CONFIG_DEBUG_OCD
 
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                /* debug using UniCore On-Chip-Debugger */
 
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                .macro  addruart, rx
 
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                .endm
 
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                .macro  senduart, rd, rx
 
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                put_word_ocd    \rd, \rx
 
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                .endm
 
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                .macro  busyuart, rd, rx
 
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                .endm
 
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                .macro  waituart, rd, rx
 
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                .endm
 
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#else
 
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#define UART_CLK_DEFAULT        3686400 * 20
 
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        /* Uartclk = MCLK/ 2, The MCLK on my board is 3686400 * 40  */
 
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#define BAUD_RATE_DEFAULT       115200
 
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        /* The baud rate of the serial port */
 
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#define UART_DIVISOR_DEFAULT    (UART_CLK_DEFAULT \
 
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                                / (16 * BAUD_RATE_DEFAULT) - 1)
 
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                .macro  addruart,rx
 
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                mrc     p0, #0, \rx, c1, c0
 
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                tst     \rx, #1                 @ MMU enabled?
 
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                moveq   \rx, #0xee000000        @ physical base address
 
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                movne   \rx, #0x6e000000        @ virtual address
 
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                @ We probe for the active serial port here
 
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                @ However, now we assume UART0 is active:       epip4d
 
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                @ We assume r1 and r2 can be clobbered.
 
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                movl    r2, #UART_DIVISOR_DEFAULT
 
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                mov     r1, #0x80
 
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                str     r1, [\rx, #UART_LCR_OFFSET]
 
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                and     r1, r2, #0xff00
 
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                mov     r1, r1, lsr #8
 
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                str     r1, [\rx, #UART_DLH_OFFSET]
 
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                and     r1, r2, #0xff
 
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                str     r1, [\rx, #UART_DLL_OFFSET]
 
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                mov     r1, #0x7
 
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                str     r1, [\rx, #UART_FCR_OFFSET]
 
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                mov     r1, #0x3
 
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                str     r1, [\rx, #UART_LCR_OFFSET]
 
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                mov     r1, #0x0
 
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                str     r1, [\rx, #UART_IER_OFFSET]
 
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                .endm
 
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                .macro  senduart,rd,rx
 
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                str     \rd, [\rx, #UART_THR_OFFSET]
 
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                .endm
 
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                .macro  waituart,rd,rx
 
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1001:           ldr     \rd, [\rx, #UART_LSR_OFFSET]
 
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                tst     \rd, #UART_LSR_THRE
 
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                beq     1001b
 
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                .endm
 
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                .macro  busyuart,rd,rx
 
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1001:           ldr     \rd, [\rx, #UART_LSR_OFFSET]
 
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                tst     \rd, #UART_LSR_TEMT
 
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                bne     1001b
 
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                .endm
 
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#endif
 
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