/* * linux/arch/arm/kernel/debug-armv.S * * Copyright (C) 1994-1999 Russell King * * 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. * * 32-bit debugging code */ #include #include #include .text /* * Some debugging routines (useful if you've got MM problems and * printk isn't working). For DEBUGGING ONLY!!! Do not leave * references to these in a production kernel! */ #if defined(CONFIG_ARCH_RPC) || defined(CONFIG_ARCH_RISCSTATION) .macro addruart,rx /* note, errors can occur in the head code BEFORE the memory map has been * setup (and therefore the mapping for the IO) so the #if statement allows * the address of the uart to be changed to the physical address instead of * the logical * * (bjd) */ mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? movne \rx, #0xe0000000 moveq \rx, #0x03000000 orr \rx, \rx, #0x00010000 orr \rx, \rx, #0x00000fe0 .endm .macro senduart,rd,rx strb \rd, [\rx] .endm .macro busyuart,rd,rx 1001: ldrb \rd, [\rx, #0x14] and \rd, \rd, #0x60 teq \rd, #0x60 bne 1001b .endm .macro waituart,rd,rx 1001: ldrb \rd, [\rx, #0x18] tst \rd, #0x10 beq 1001b .endm #elif defined(CONFIG_ARCH_EBSA110) .macro addruart,rx mov \rx, #0xf0000000 orr \rx, \rx, #0x00000be0 .endm .macro senduart,rd,rx strb \rd, [\rx] .endm .macro busyuart,rd,rx 1002: ldrb \rd, [\rx, #0x14] and \rd, \rd, #0x60 teq \rd, #0x60 bne 1002b .endm .macro waituart,rd,rx 1001: ldrb \rd, [\rx, #0x18] tst \rd, #0x10 beq 1001b .endm #elif defined(CONFIG_ARCH_SHARK) .macro addruart,rx mov \rx, #0xe0000000 orr \rx, \rx, #0x000003f8 .endm .macro senduart,rd,rx strb \rd, [\rx] .endm .macro busyuart,rd,rx mov \rd, #0 1001: add \rd, \rd, #1 teq \rd, #0x10000 bne 1001b .endm .macro waituart,rd,rx .endm #elif defined(CONFIG_FOOTBRIDGE) #include #ifndef CONFIG_DEBUG_DC21285_PORT /* For NetWinder debugging */ .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? moveq \rx, #0x7c000000 @ physical movne \rx, #0xff000000 @ virtual orr \rx, \rx, #0x000003f8 .endm .macro senduart,rd,rx strb \rd, [\rx] .endm .macro busyuart,rd,rx 1002: ldrb \rd, [\rx, #0x5] and \rd, \rd, #0x60 teq \rd, #0x60 bne 1002b .endm .macro waituart,rd,rx 1001: ldrb \rd, [\rx, #0x6] tst \rd, #0x10 beq 1001b .endm #else /* For EBSA285 debugging */ .equ dc21285_high, ARMCSR_BASE & 0xff000000 .equ dc21285_low, ARMCSR_BASE & 0x00ffffff .macro addruart,rx mov \rx, #dc21285_high .if dc21285_low orr \rx, \rx, #dc21285_low .endif .endm .macro senduart,rd,rx str \rd, [\rx, #0x160] @ UARTDR .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #0x178] @ UARTFLG tst \rd, #1 << 3 bne 1001b .endm .macro waituart,rd,rx .endm #endif #elif defined(CONFIG_ARCH_FTVPCI) .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? movne \rx, #0xe0000000 moveq \rx, #0x10000000 .endm .macro senduart,rd,rx str \rd, [\rx, #0xc] .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #0x4] tst \rd, #1 << 2 beq 1001b .endm .macro waituart,rd,rx .endm #elif defined(CONFIG_ARCH_SA1100) .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? moveq \rx, #0x80000000 @ physical base address movne \rx, #0xf8000000 @ virtual address @ We probe for the active serial port here, coherently with @ the comment in include/asm-arm/arch-sa1100/uncompress.h. @ We assume r1 can be clobbered. @ see if Ser3 is active add \rx, \rx, #0x00050000 ldr r1, [\rx, #UTCR3] tst r1, #UTCR3_TXE @ if Ser3 is inactive, then try Ser1 addeq \rx, \rx, #(0x00010000 - 0x00050000) ldreq r1, [\rx, #UTCR3] tsteq r1, #UTCR3_TXE @ if Ser1 is inactive, then try Ser2 addeq \rx, \rx, #(0x00030000 - 0x00010000) ldreq r1, [\rx, #UTCR3] tsteq r1, #UTCR3_TXE @ if all ports are inactive, then there is nothing we can do moveq pc, lr .endm .macro senduart,rd,rx str \rd, [\rx, #UTDR] .endm .macro waituart,rd,rx 1001: ldr \rd, [\rx, #UTSR1] tst \rd, #UTSR1_TNF beq 1001b .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #UTSR1] tst \rd, #UTSR1_TBY bne 1001b .endm #elif defined(CONFIG_ARCH_CLPS7500) .macro addruart,rx mov \rx, #0xe0000000 orr \rx, \rx, #0x00010000 orr \rx, \rx, #0x00000be0 .endm .macro senduart,rd,rx strb \rd, [\rx] .endm .macro busyuart,rd,rx .endm .macro waituart,rd,rx 1001: ldrb \rd, [\rx, #0x14] tst \rd, #0x20 beq 1001b .endm #elif defined(CONFIG_ARCH_L7200) .equ io_virt, IO_BASE .equ io_phys, IO_START .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? moveq \rx, #io_phys @ physical base address movne \rx, #io_virt @ virtual address add \rx, \rx, #0x00044000 @ UART1 @ add \rx, \rx, #0x00045000 @ UART2 .endm .macro senduart,rd,rx str \rd, [\rx, #0x0] @ UARTDR .endm .macro waituart,rd,rx 1001: ldr \rd, [\rx, #0x18] @ UARTFLG tst \rd, #1 << 5 @ UARTFLGUTXFF - 1 when full bne 1001b .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #0x18] @ UARTFLG tst \rd, #1 << 3 @ UARTFLGUBUSY - 1 when busy bne 1001b .endm #elif defined(CONFIG_ARCH_INTEGRATOR) #include .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? moveq \rx, #0x16000000 @ physical base address movne \rx, #0xf0000000 @ virtual base addne \rx, \rx, #0x16000000 >> 4 .endm .macro senduart,rd,rx strb \rd, [\rx, #AMBA_UARTDR] .endm .macro waituart,rd,rx 1001: ldr \rd, [\rx, #0x18] @ UARTFLG tst \rd, #1 << 5 @ UARTFLGUTXFF - 1 when full bne 1001b .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #0x18] @ UARTFLG tst \rd, #1 << 3 @ UARTFLGUBUSY - 1 when busy bne 1001b .endm #elif defined(CONFIG_ARCH_AT91RM9200) .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? ldreq \rx, =AT91C_BASE_SYS @ System peripherals (phys address) ldrne \rx, =AT91C_VA_BASE_SYS @ System peripherals (virt address) .endm .macro senduart,rd,rx strb \rd, [\rx, #DBGU_THR] @ DBGU_THR .endm .macro waituart,rd,rx 1001: ldr \rd, [\rx, #DBGU_CSR] @ DBGU_CSR tst \rd, #AT91C_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit beq 1001b .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #DBGU_CSR] @ DBGU_CSR tst \rd, #AT91C_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete beq 1001b .endm #elif defined(CONFIG_ARCH_CLPS711X) #include .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? moveq \rx, #CLPS7111_PHYS_BASE movne \rx, #CLPS7111_VIRT_BASE #ifndef CONFIG_DEBUG_CLPS711X_UART2 add \rx, \rx, #0x0000 @ UART1 #else add \rx, \rx, #0x1000 @ UART2 #endif .endm .macro senduart,rd,rx str \rd, [\rx, #0x0480] @ UARTDR .endm .macro waituart,rd,rx 1001: ldr \rd, [\rx, #0x0140] @ SYSFLGx tst \rd, #1 << 11 @ UBUSYx bne 1001b .endm .macro busyuart,rd,rx tst \rx, #0x1000 @ UART2 does not have CTS here bne 1002f 1001: ldr \rd, [\rx, #0x0140] @ SYSFLGx tst \rd, #1 << 8 @ CTS bne 1001b 1002: .endm #elif defined(CONFIG_ARCH_OMAHA) #include .macro addruart,rx .endm .macro senduart,rd,rx .endm .macro waituart,rd,rx .endm .macro busyuart,rd,rx .endm #elif defined(CONFIG_ARCH_ANAKIN) //#//include .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? moveq \rx, #IO_START movne \rx, #IO_BASE add \rx, \rx, #UART0 .endm .macro senduart,rd,rx str \rd, [\rx, #0x14] @ tx ldr \rd, [\rx, #0x18] orr \rd, \rd, #SENDREQUEST str \rd, [\rx, #0x18] .endm .macro waituart,rd,rx 1001: ldr \rd, [\rx, #0x10] tst \rd, #TXEMPTY beq 1001b .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #0x10] tst \rd, #CTS bne 1001b .endm #elif defined(CONFIG_ARCH_CAMELOT) #include #define UART00_TYPE #include .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? ldr \rx, =EXC_UART00_BASE @ physical base address orrne \rx, \rx, #0xff000000 @ virtual base orrne \rx, \rx, #0x00f00000 .endm .macro senduart,rd,rx str \rd, [\rx, #UART_TD(0)] .endm .macro waituart,rd,rx 1001: ldr \rd, [\rx, #UART_TSR(0)] and \rd, \rd, #UART_TSR_TX_LEVEL_MSK cmp \rd, #15 beq 1001b .endm .macro busyuart,rd,rx 1001: ldr \rd, [\rx, #UART_TSR(0)] ands \rd, \rd, #UART_TSR_TX_LEVEL_MSK bne 1001b .endm #elif defined(CONFIG_ARCH_MX1ADS) .macro addruart,rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 @ MMU enabled? moveq \rx, #0x00000000 @ physical movne \rx, #0xf0000000 @ virtual orr \rx, \rx, #0x00200000 orr \rx, \rx, #0x00006000 @ UART1 offset .endm .macro senduart,rd,rx str \rd, [\rx, #0x40] @ TXDATA .endm .macro waituart,rd,rx #if 0 /* REVISIT: This isn't right. I believe we should be checking CTS here instead * to see if the user has entered to pause console output. * gdavis@mvista.com 28apr03 */ 1001: ldr \rd, [\rx, #0x94] @ SR1 tst \rd, #1 << 13 @ TRDY bne 1001b @ wait until TX FIFO ready #endif .endm .macro busyuart,rd,rx 1002: ldr \rd, [\rx, #0x98] @ SR2 tst \rd, #1 << 3 @ TXDC beq 1002b @ wait until transmit done .endm #else #error Unknown architecture #endif /* * Useful debugging routines */ ENTRY(printhex8) mov r1, #8 b printhex ENTRY(printhex4) mov r1, #4 b printhex ENTRY(printhex2) mov r1, #2 printhex: adr r2, hexbuf add r3, r2, r1 mov r1, #0 strb r1, [r3] 1: and r1, r0, #15 mov r0, r0, lsr #4 cmp r1, #10 addlt r1, r1, #'0' addge r1, r1, #'a' - 10 strb r1, [r3, #-1]! teq r3, r2 bne 1b mov r0, r2 b printascii .ltorg ENTRY(printascii) addruart r3 b 2f 1: waituart r2, r3 senduart r1, r3 busyuart r2, r3 teq r1, #'\n' moveq r1, #'\r' beq 1b 2: teq r0, #0 ldrneb r1, [r0], #1 teqne r1, #0 bne 1b mov pc, lr ENTRY(printch) addruart r3 mov r1, r0 mov r0, #0 b 1b hexbuf: .space 16