mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
808b7e0746
Add multiplatform debug_ll support by stripping away the custom hacks to detect the port from debug-macro.S. Note that this now requires the specific debug_ll port to be selected in the .config. The old debug-macro.S will be removed a bit later once we are sure things work properly with multiplatform enabled. Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
191 lines
5.1 KiB
ArmAsm
191 lines
5.1 KiB
ArmAsm
/*
|
|
* Debugging macro include header
|
|
*
|
|
* Copyright (C) 1994-1999 Russell King
|
|
* Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
|
|
*
|
|
* 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/serial_reg.h>
|
|
|
|
/* OMAP2 serial ports */
|
|
#define OMAP2_UART1_BASE 0x4806a000
|
|
#define OMAP2_UART2_BASE 0x4806c000
|
|
#define OMAP2_UART3_BASE 0x4806e000
|
|
|
|
/* OMAP3 serial ports */
|
|
#define OMAP3_UART1_BASE OMAP2_UART1_BASE
|
|
#define OMAP3_UART2_BASE OMAP2_UART2_BASE
|
|
#define OMAP3_UART3_BASE 0x49020000
|
|
#define OMAP3_UART4_BASE 0x49042000 /* Only on 36xx */
|
|
#define OMAP3_UART4_AM35XX_BASE 0x4809E000 /* Only on AM35xx */
|
|
|
|
/* OMAP4 serial ports */
|
|
#define OMAP4_UART1_BASE OMAP2_UART1_BASE
|
|
#define OMAP4_UART2_BASE OMAP2_UART2_BASE
|
|
#define OMAP4_UART3_BASE 0x48020000
|
|
#define OMAP4_UART4_BASE 0x4806e000
|
|
|
|
/* TI81XX serial ports */
|
|
#define TI81XX_UART1_BASE 0x48020000
|
|
#define TI81XX_UART2_BASE 0x48022000
|
|
#define TI81XX_UART3_BASE 0x48024000
|
|
|
|
/* AM3505/3517 UART4 */
|
|
#define AM35XX_UART4_BASE 0x4809E000 /* Only on AM3505/3517 */
|
|
|
|
/* AM33XX serial port */
|
|
#define AM33XX_UART1_BASE 0x44E09000
|
|
|
|
/* OMAP5 serial ports */
|
|
#define OMAP5_UART1_BASE OMAP2_UART1_BASE
|
|
#define OMAP5_UART2_BASE OMAP2_UART2_BASE
|
|
#define OMAP5_UART3_BASE OMAP4_UART3_BASE
|
|
#define OMAP5_UART4_BASE OMAP4_UART4_BASE
|
|
#define OMAP5_UART5_BASE 0x48066000
|
|
#define OMAP5_UART6_BASE 0x48068000
|
|
|
|
/* External port on Zoom2/3 */
|
|
#define ZOOM_UART_BASE 0x10000000
|
|
#define ZOOM_UART_VIRT 0xfa400000
|
|
|
|
#define OMAP_PORT_SHIFT 2
|
|
#define ZOOM_PORT_SHIFT 1
|
|
|
|
#define UART_OFFSET(addr) ((addr) & 0x00ffffff)
|
|
|
|
.pushsection .data
|
|
omap_uart_phys: .word 0
|
|
omap_uart_virt: .word 0
|
|
omap_uart_lsr: .word 0
|
|
.popsection
|
|
|
|
.macro addruart, rp, rv, tmp
|
|
|
|
/* Use omap_uart_phys/virt if already configured */
|
|
10: adr \rp, 99f @ get effective addr of 99f
|
|
ldr \rv, [\rp] @ get absolute addr of 99f
|
|
sub \rv, \rv, \rp @ offset between the two
|
|
ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys
|
|
sub \tmp, \rp, \rv @ make it effective
|
|
ldr \rp, [\tmp, #0] @ omap_uart_phys
|
|
ldr \rv, [\tmp, #4] @ omap_uart_virt
|
|
cmp \rp, #0 @ is port configured?
|
|
cmpne \rv, #0
|
|
bne 100f @ already configured
|
|
|
|
/* Configure the UART offset from the phys/virt base */
|
|
#ifdef CONFIG_DEBUG_OMAP2UART1
|
|
mov \rp, #UART_OFFSET(OMAP2_UART1_BASE) @ omap2/3/4
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_OMAP2UART2
|
|
mov \rp, #UART_OFFSET(OMAP2_UART2_BASE) @ omap2/3/4
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_OMAP2UART3
|
|
mov \rp, #UART_OFFSET(OMAP2_UART3_BASE)
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_OMAP3UART3
|
|
mov \rp, #UART_OFFSET(OMAP3_UART1_BASE)
|
|
add \rp, \rp, #0x00fb0000
|
|
add \rp, \rp, #0x00006000 @ OMAP3_UART3_BASE
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_OMAP4UART3
|
|
mov \rp, #UART_OFFSET(OMAP4_UART3_BASE)
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_OMAP3UART4
|
|
mov \rp, #UART_OFFSET(OMAP3_UART1_BASE)
|
|
add \rp, \rp, #0x00fb0000
|
|
add \rp, \rp, #0x00028000 @ OMAP3_UART4_BASE
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_OMAP4UART4
|
|
mov \rp, #UART_OFFSET(OMAP4_UART4_BASE)
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_TI81XXUART1
|
|
mov \rp, #UART_OFFSET(TI81XX_UART1_BASE)
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_TI81XXUART2
|
|
mov \rp, #UART_OFFSET(TI81XX_UART2_BASE)
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_TI81XXUART3
|
|
mov \rp, #UART_OFFSET(TI81XX_UART3_BASE)
|
|
b 98f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_AM33XXUART1
|
|
ldr \rp, =AM33XX_UART1_BASE
|
|
and \rp, \rp, #0x00ffffff
|
|
b 97f
|
|
#endif
|
|
#ifdef CONFIG_DEBUG_ZOOM_UART
|
|
ldr \rp, =ZOOM_UART_BASE
|
|
str \rp, [\tmp, #0] @ omap_uart_phys
|
|
ldr \rp, =ZOOM_UART_VIRT
|
|
str \rp, [\tmp, #4] @ omap_uart_virt
|
|
mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT)
|
|
str \rp, [\tmp, #8] @ omap_uart_lsr
|
|
#endif
|
|
b 10b
|
|
|
|
/* AM33XX: Store both phys and virt address for the uart */
|
|
97: add \rp, \rp, #0x44000000 @ phys base
|
|
str \rp, [\tmp, #0] @ omap_uart_phys
|
|
sub \rp, \rp, #0x44000000 @ phys base
|
|
add \rp, \rp, #0xf9000000 @ virt base
|
|
str \rp, [\tmp, #4] @ omap_uart_virt
|
|
mov \rp, #(UART_LSR << OMAP_PORT_SHIFT)
|
|
str \rp, [\tmp, #8] @ omap_uart_lsr
|
|
|
|
b 10b
|
|
|
|
/* Store both phys and virt address for the uart */
|
|
98: add \rp, \rp, #0x48000000 @ phys base
|
|
str \rp, [\tmp, #0] @ omap_uart_phys
|
|
sub \rp, \rp, #0x48000000 @ phys base
|
|
add \rp, \rp, #0xfa000000 @ virt base
|
|
str \rp, [\tmp, #4] @ omap_uart_virt
|
|
mov \rp, #(UART_LSR << OMAP_PORT_SHIFT)
|
|
str \rp, [\tmp, #8] @ omap_uart_lsr
|
|
|
|
b 10b
|
|
|
|
.align
|
|
99: .word .
|
|
.word omap_uart_phys
|
|
.ltorg
|
|
|
|
100: /* Pass the UART_LSR reg address */
|
|
ldr \tmp, [\tmp, #8] @ omap_uart_lsr
|
|
add \rp, \rp, \tmp
|
|
add \rv, \rv, \tmp
|
|
.endm
|
|
|
|
.macro senduart,rd,rx
|
|
orr \rd, \rd, \rx, lsl #24 @ preserve LSR reg offset
|
|
bic \rx, \rx, #0xff @ get base (THR) reg address
|
|
strb \rd, [\rx] @ send lower byte of rd
|
|
orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR)
|
|
bic \rd, \rd, #(0xff << 24) @ restore original rd
|
|
.endm
|
|
|
|
.macro busyuart,rd,rx
|
|
1001: ldrb \rd, [\rx] @ rx contains UART_LSR address
|
|
and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
|
|
teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
|
|
bne 1001b
|
|
.endm
|
|
|
|
.macro waituart,rd,rx
|
|
.endm
|