mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-29 06:13:45 +09:00
ab80b65957
The early serial should not be configured again in initcode() for BYPASS boot mode and in start() for the other LDR boot modes. In BYPASS boot mode, the start up code is located in Nor flash address other than the DRAM address defined in link script. The code embedded string can't be addressed by its compile time symbol. Calculate it according to the flash offset. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
/*
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* serial.h - common serial defines for early debug and serial driver.
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* any functions defined here must be always_inline since
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* initcode cannot have function calls.
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*
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* Copyright (c) 2004-2011 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef __BFIN_CPU_SERIAL_H__
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#define __BFIN_CPU_SERIAL_H__
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#include <asm/blackfin.h>
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#include <asm/portmux.h>
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#ifndef CONFIG_UART_CONSOLE
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# define CONFIG_UART_CONSOLE 0
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#endif
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#ifdef CONFIG_DEBUG_EARLY_SERIAL
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# define BFIN_DEBUG_EARLY_SERIAL 1
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#else
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# define BFIN_DEBUG_EARLY_SERIAL 0
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#endif
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#if defined(__ADSPBF60x__)
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# define BFIN_UART_HW_VER 4
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#elif defined(__ADSPBF50x__) || defined(__ADSPBF54x__)
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# define BFIN_UART_HW_VER 2
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#else
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# define BFIN_UART_HW_VER 1
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#endif
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#define __PASTE_UART(num, pfx, sfx) pfx##num##_##sfx
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#define _PASTE_UART(num, pfx, sfx) __PASTE_UART(num, pfx, sfx)
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#define _P_UART(n, pin) _PASTE_UART(n, P_UART, pin)
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#define P_UART(pin) _P_UART(CONFIG_UART_CONSOLE, pin)
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#define pUART ((volatile struct bfin_mmr_serial *)uart_base)
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#ifndef __ASSEMBLY__
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__attribute__((always_inline))
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static inline void serial_do_portmux(void);
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#endif
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#if BFIN_UART_HW_VER < 4
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# include "serial1.h"
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#else
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# include "serial4.h"
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#endif
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#ifndef __ASSEMBLY__
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__attribute__((always_inline))
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static inline void serial_do_portmux(void)
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{
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if (!BFIN_DEBUG_EARLY_SERIAL) {
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const unsigned short pins[] = { P_UART(RX), P_UART(TX), 0, };
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peripheral_request_list(pins, "bfin-uart");
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return;
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}
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serial_early_do_portmux();
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}
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#ifndef BFIN_IN_INITCODE
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__attribute__((always_inline))
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static inline void serial_early_puts(const char *s)
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{
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if (BFIN_DEBUG_EARLY_SERIAL) {
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serial_puts("Early: ");
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serial_puts(s);
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}
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}
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#endif
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#else
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.macro serial_early_init
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#if defined(CONFIG_DEBUG_EARLY_SERIAL) && defined(BFIN_BOOT_BYPASS)
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call _serial_initialize;
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#endif
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.endm
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.macro serial_early_set_baud
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#if defined(CONFIG_DEBUG_EARLY_SERIAL) && defined(BFIN_BOOT_BYPASS)
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R0.L = LO(CONFIG_BAUDRATE);
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R0.H = HI(CONFIG_BAUDRATE);
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call _serial_set_baud;
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#endif
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.endm
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#if CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_BYPASS
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#define update_serial_early_string_addr \
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R1.L = _start; \
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R1.H = _start; \
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R0 = R0 - R1; \
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R1.L = 0; \
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R1.H = 0x2000; \
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R0 = R0 + R1;
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#else
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#define update_serial_early_string_addr
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#endif
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/* Since we embed the string right into our .text section, we need
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* to find its address. We do this by getting our PC and adding 2
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* bytes (which is the length of the jump instruction). Then we
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* pass this address to serial_puts().
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*/
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#ifdef CONFIG_DEBUG_EARLY_SERIAL
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# define serial_early_puts(str) \
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.section .rodata; \
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7: \
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.ascii "Early:"; \
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.ascii __FILE__; \
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.ascii ": "; \
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.ascii str; \
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.asciz "\n"; \
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.previous; \
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R0.L = 7b; \
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R0.H = 7b; \
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update_serial_early_string_addr \
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call _serial_puts;
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#else
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# define serial_early_puts(str)
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#endif
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#endif
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#endif
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