mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 08:20:50 +07:00
28bab059a2
This patch implements low-level debug libraries with On-Chip-Debugger hardware support. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Acked-by: Arnd Bergmann <arnd@arndb.de>
90 lines
2.0 KiB
ArmAsm
90 lines
2.0 KiB
ArmAsm
/*
|
|
* linux/arch/unicore32/kernel/debug-macro.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.
|
|
*
|
|
* Debugging macro include header
|
|
*/
|
|
#include <generated/asm-offsets.h>
|
|
#include <mach/hardware.h>
|
|
|
|
.macro put_word_ocd, rd, rx=r16
|
|
1001: movc \rx, p1.c0, #0
|
|
cand.a \rx, #2
|
|
bne 1001b
|
|
movc p1.c1, \rd, #1
|
|
.endm
|
|
|
|
#ifdef CONFIG_DEBUG_OCD
|
|
/* debug using UniCore On-Chip-Debugger */
|
|
.macro addruart, rx
|
|
.endm
|
|
|
|
.macro senduart, rd, rx
|
|
put_word_ocd \rd, \rx
|
|
.endm
|
|
|
|
.macro busyuart, rd, rx
|
|
.endm
|
|
|
|
.macro waituart, rd, rx
|
|
.endm
|
|
#else
|
|
#define UART_CLK_DEFAULT 3686400 * 20
|
|
/* Uartclk = MCLK/ 2, The MCLK on my board is 3686400 * 40 */
|
|
#define BAUD_RATE_DEFAULT 115200
|
|
/* The baud rate of the serial port */
|
|
|
|
#define UART_DIVISOR_DEFAULT (UART_CLK_DEFAULT \
|
|
/ (16 * BAUD_RATE_DEFAULT) - 1)
|
|
|
|
.macro addruart,rx
|
|
mrc p0, #0, \rx, c1, c0
|
|
tst \rx, #1 @ MMU enabled?
|
|
moveq \rx, #0xee000000 @ physical base address
|
|
movne \rx, #0x6e000000 @ virtual address
|
|
|
|
@ We probe for the active serial port here
|
|
@ However, now we assume UART0 is active: epip4d
|
|
@ We assume r1 and r2 can be clobbered.
|
|
|
|
movl r2, #UART_DIVISOR_DEFAULT
|
|
mov r1, #0x80
|
|
str r1, [\rx, #UART_LCR_OFFSET]
|
|
and r1, r2, #0xff00
|
|
mov r1, r1, lsr #8
|
|
str r1, [\rx, #UART_DLH_OFFSET]
|
|
and r1, r2, #0xff
|
|
str r1, [\rx, #UART_DLL_OFFSET]
|
|
mov r1, #0x7
|
|
str r1, [\rx, #UART_FCR_OFFSET]
|
|
mov r1, #0x3
|
|
str r1, [\rx, #UART_LCR_OFFSET]
|
|
mov r1, #0x0
|
|
str r1, [\rx, #UART_IER_OFFSET]
|
|
.endm
|
|
|
|
.macro senduart,rd,rx
|
|
str \rd, [\rx, #UART_THR_OFFSET]
|
|
.endm
|
|
|
|
.macro waituart,rd,rx
|
|
1001: ldr \rd, [\rx, #UART_LSR_OFFSET]
|
|
tst \rd, #UART_LSR_THRE
|
|
beq 1001b
|
|
.endm
|
|
|
|
.macro busyuart,rd,rx
|
|
1001: ldr \rd, [\rx, #UART_LSR_OFFSET]
|
|
tst \rd, #UART_LSR_TEMT
|
|
bne 1001b
|
|
.endm
|
|
#endif
|
|
|