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Move console drivers to AArch64 folder

Browse source 
This patch moves the various assembly console drivers
into `aarch64` architecture specific folder. Stub files,
which include files from new location, are retained at the
original location for platform compatibility reasons.

Change-Id: I0069b6c1c0489ca47f5204d4e26e3bc3def533a8
This commit is contained in:
Soby Mathew 2016-08-08 12:38:52 +01:00
parent 200026557c
commit 9c94d3b326
10 changed files with 672 additions and 507 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

153
drivers/arm/pl011/aarch64/pl011_console.S Normal file
View file

@ -0,0 +1,153 @@
/*
* Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <asm_macros.S>
#include <pl011.h>
/*
* Pull in generic functions to provide backwards compatibility for
* platform makefiles
*/
#include "../../../console/aarch64/console.S"
.globl console_core_init
.globl console_core_putc
.globl console_core_getc
/* -----------------------------------------------
* int console_core_init(uintptr_t base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. This
* function will be accessed by console_init and
* crash reporting.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* Out: return 1 on success else 0 on error
* Clobber list : x1, x2, x3, x4
* -----------------------------------------------
*/
func console_core_init
/* Check the input base address */
cbz x0, core_init_fail
#if !PL011_GENERIC_UART
/* Check baud rate and uart clock for sanity */
cbz w1, core_init_fail
cbz w2, core_init_fail
/* Disable uart before programming */
ldr w3, [x0, #UARTCR]
mov w4, #PL011_UARTCR_UARTEN
bic w3, w3, w4
str w3, [x0, #UARTCR]
/* Program the baudrate */
/* Divisor = (Uart clock * 4) / baudrate */
lsl w1, w1, #2
udiv w2, w1, w2
/* IBRD = Divisor >> 6 */
lsr w1, w2, #6
/* Write the IBRD */
str w1, [x0, #UARTIBRD]
/* FBRD = Divisor & 0x3F */
and w1, w2, #0x3f
/* Write the FBRD */
str w1, [x0, #UARTFBRD]
mov w1, #PL011_LINE_CONTROL
str w1, [x0, #UARTLCR_H]
/* Clear any pending errors */
str wzr, [x0, #UARTECR]
/* Enable tx, rx, and uart overall */
mov w1, #(PL011_UARTCR_RXE | PL011_UARTCR_TXE | PL011_UARTCR_UARTEN)
str w1, [x0, #UARTCR]
#endif
mov w0, #1
ret
core_init_fail:
mov w0, wzr
ret
endfunc console_core_init
/* --------------------------------------------------------
* int console_core_putc(int c, uintptr_t base_addr)
* Function to output a character over the console. It
* returns the character printed on success or -1 on error.
* In : w0 - character to be printed
* x1 - console base address
* Out : return -1 on error else return character.
* Clobber list : x2
* --------------------------------------------------------
*/
func console_core_putc
/* Check the input parameter */
cbz x1, putc_error
/* Prepend '\r' to '\n' */
cmp w0, #0xA
b.ne 2f
1:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #UARTFR]
tbnz w2, #PL011_UARTFR_TXFF_BIT, 1b
mov w2, #0xD
str w2, [x1, #UARTDR]
2:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #UARTFR]
tbnz w2, #PL011_UARTFR_TXFF_BIT, 2b
str w0, [x1, #UARTDR]
ret
putc_error:
mov w0, #-1
ret
endfunc console_core_putc
/* ---------------------------------------------
* int console_core_getc(uintptr_t base_addr)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* In : x0 - console base address
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_core_getc
cbz x0, getc_error
1:
/* Check if the receive FIFO is empty */
ldr w1, [x0, #UARTFR]
tbnz w1, #PL011_UARTFR_RXFE_BIT, 1b
ldr w1, [x0, #UARTDR]
mov w0, w1
ret
getc_error:
mov w0, #-1
ret
endfunc console_core_getc

126
drivers/arm/pl011/pl011_console.S
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@ -27,127 +27,7 @@
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <asm_macros.S>
#include <pl011.h>
/*
* Pull in generic functions to provide backwards compatibility for
* platform makefiles
*/
#include "../../console/console.S"
.globl console_core_init
.globl console_core_putc
.globl console_core_getc
/* -----------------------------------------------
* int console_core_init(uintptr_t base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. This
* function will be accessed by console_init and
* crash reporting.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* Out: return 1 on success else 0 on error
* Clobber list : x1, x2, x3, x4
* -----------------------------------------------
*/
func console_core_init
/* Check the input base address */
cbz x0, core_init_fail
#if !PL011_GENERIC_UART
/* Check baud rate and uart clock for sanity */
cbz w1, core_init_fail
cbz w2, core_init_fail
/* Disable uart before programming */
ldr w3, [x0, #UARTCR]
mov w4, #PL011_UARTCR_UARTEN
bic w3, w3, w4
str w3, [x0, #UARTCR]
/* Program the baudrate */
/* Divisor = (Uart clock * 4) / baudrate */
lsl w1, w1, #2
udiv w2, w1, w2
/* IBRD = Divisor >> 6 */
lsr w1, w2, #6
/* Write the IBRD */
str w1, [x0, #UARTIBRD]
/* FBRD = Divisor & 0x3F */
and w1, w2, #0x3f
/* Write the FBRD */
str w1, [x0, #UARTFBRD]
mov w1, #PL011_LINE_CONTROL
str w1, [x0, #UARTLCR_H]
/* Clear any pending errors */
str wzr, [x0, #UARTECR]
/* Enable tx, rx, and uart overall */
mov w1, #(PL011_UARTCR_RXE | PL011_UARTCR_TXE | PL011_UARTCR_UARTEN)
str w1, [x0, #UARTCR]
#if !ERROR_DEPRECATED
#include "./aarch64/pl011_console.S"
#endif
mov w0, #1
ret
core_init_fail:
mov w0, wzr
ret
endfunc console_core_init
/* --------------------------------------------------------
* int console_core_putc(int c, uintptr_t base_addr)
* Function to output a character over the console. It
* returns the character printed on success or -1 on error.
* In : w0 - character to be printed
* x1 - console base address
* Out : return -1 on error else return character.
* Clobber list : x2
* --------------------------------------------------------
*/
func console_core_putc
/* Check the input parameter */
cbz x1, putc_error
/* Prepend '\r' to '\n' */
cmp w0, #0xA
b.ne 2f
1:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #UARTFR]
tbnz w2, #PL011_UARTFR_TXFF_BIT, 1b
mov w2, #0xD
str w2, [x1, #UARTDR]
2:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #UARTFR]
tbnz w2, #PL011_UARTFR_TXFF_BIT, 2b
str w0, [x1, #UARTDR]
ret
putc_error:
mov w0, #-1
ret
endfunc console_core_putc
/* ---------------------------------------------
* int console_core_getc(uintptr_t base_addr)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* In : x0 - console base address
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_core_getc
cbz x0, getc_error
1:
/* Check if the receive FIFO is empty */
ldr w1, [x0, #UARTFR]
tbnz w1, #PL011_UARTFR_RXFE_BIT, 1b
ldr w1, [x0, #UARTDR]
mov w0, w1
ret
getc_error:
mov w0, #-1
ret
endfunc console_core_getc

127
drivers/cadence/uart/aarch64/cdns_console.S Normal file
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@ -0,0 +1,127 @@
/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <asm_macros.S>
#include <cadence/cdns_uart.h>
.globl console_core_init
.globl console_core_putc
.globl console_core_getc
/* -----------------------------------------------
* int console_core_init(unsigned long base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. This
* function will be accessed by console_init and
* crash reporting.
* We assume that the bootloader already set up
* the HW (baud, ...) and only enable the trans-
* mitter and receiver here.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* Out: return 1 on success else 0 on error
* Clobber list : x1, x2, x3
* -----------------------------------------------
*/
func console_core_init
/* Check the input base address */
cbz x0, core_init_fail
/* Check baud rate and uart clock for sanity */
cbz w1, core_init_fail
cbz w2, core_init_fail
/* RX/TX enabled & reset */
mov w3, #(R_UART_CR_TX_EN | R_UART_CR_RX_EN | R_UART_CR_TXRST | R_UART_CR_RXRST)
str w3, [x0, #R_UART_CR]
mov w0, #1
ret
core_init_fail:
mov w0, wzr
ret
endfunc console_core_init
/* --------------------------------------------------------
* int console_core_putc(int c, unsigned long base_addr)
* Function to output a character over the console. It
* returns the character printed on success or -1 on error.
* In : w0 - character to be printed
* x1 - console base address
* Out : return -1 on error else return character.
* Clobber list : x2
* --------------------------------------------------------
*/
func console_core_putc
/* Check the input parameter */
cbz x1, putc_error
/* Prepend '\r' to '\n' */
cmp w0, #0xA
b.ne 2f
1:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #R_UART_SR]
tbnz w2, #UART_SR_INTR_TFUL_BIT, 1b
mov w2, #0xD
str w2, [x1, #R_UART_TX]
2:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #R_UART_SR]
tbnz w2, #UART_SR_INTR_TFUL_BIT, 2b
str w0, [x1, #R_UART_TX]
ret
putc_error:
mov w0, #-1
ret
endfunc console_core_putc
/* ---------------------------------------------
* int console_core_getc(unsigned long base_addr)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* In : x0 - console base address
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_core_getc
cbz x0, getc_error
1:
/* Check if the receive FIFO is empty */
ldr w1, [x0, #R_UART_SR]
tbnz w1, #UART_SR_INTR_REMPTY_BIT, 1b
ldr w1, [x0, #R_UART_RX]
mov w0, w1
ret
getc_error:
mov w0, #-1
ret
endfunc console_core_getc

100
drivers/cadence/uart/cdns_console.S
View file

@ -27,101 +27,7 @@
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <asm_macros.S>
#include <cadence/cdns_uart.h>
.globl console_core_init
.globl console_core_putc
.globl console_core_getc
/* -----------------------------------------------
* int console_core_init(unsigned long base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. This
* function will be accessed by console_init and
* crash reporting.
* We assume that the bootloader already set up
* the HW (baud, ...) and only enable the trans-
* mitter and receiver here.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* Out: return 1 on success else 0 on error
* Clobber list : x1, x2, x3
* -----------------------------------------------
*/
func console_core_init
/* Check the input base address */
cbz x0, core_init_fail
/* Check baud rate and uart clock for sanity */
cbz w1, core_init_fail
cbz w2, core_init_fail
/* RX/TX enabled & reset */
mov w3, #(R_UART_CR_TX_EN | R_UART_CR_RX_EN | R_UART_CR_TXRST | R_UART_CR_RXRST)
str w3, [x0, #R_UART_CR]
mov w0, #1
ret
core_init_fail:
mov w0, wzr
ret
endfunc console_core_init
/* --------------------------------------------------------
* int console_core_putc(int c, unsigned long base_addr)
* Function to output a character over the console. It
* returns the character printed on success or -1 on error.
* In : w0 - character to be printed
* x1 - console base address
* Out : return -1 on error else return character.
* Clobber list : x2
* --------------------------------------------------------
*/
func console_core_putc
/* Check the input parameter */
cbz x1, putc_error
/* Prepend '\r' to '\n' */
cmp w0, #0xA
b.ne 2f
1:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #R_UART_SR]
tbnz w2, #UART_SR_INTR_TFUL_BIT, 1b
mov w2, #0xD
str w2, [x1, #R_UART_TX]
2:
/* Check if the transmit FIFO is full */
ldr w2, [x1, #R_UART_SR]
tbnz w2, #UART_SR_INTR_TFUL_BIT, 2b
str w0, [x1, #R_UART_TX]
ret
putc_error:
mov w0, #-1
ret
endfunc console_core_putc
/* ---------------------------------------------
* int console_core_getc(unsigned long base_addr)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* In : x0 - console base address
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_core_getc
cbz x0, getc_error
1:
/* Check if the receive FIFO is empty */
ldr w1, [x0, #R_UART_SR]
tbnz w1, #UART_SR_INTR_REMPTY_BIT, 1b
ldr w1, [x0, #R_UART_RX]
mov w0, w1
ret
getc_error:
mov w0, #-1
ret
endfunc console_core_getc
#if !ERROR_DEPRECATED
#include "./aarch64/cdns_console.S"
#endif

113
drivers/console/aarch64/console.S Normal file
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@ -0,0 +1,113 @@
/*
* Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <asm_macros.S>
.globl console_init
.globl console_uninit
.globl console_putc
.globl console_getc
/*
* The console base is in the data section and not in .bss
* even though it is zero-init. In particular, this allows
* the console functions to start using this variable before
* the runtime memory is initialized for images which do not
* need to copy the .data section from ROM to RAM.
*/
.section .data.console_base ; .align 3
console_base: .quad 0x0
/* -----------------------------------------------
* int console_init(uintptr_t base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. It saves
* the console base to the data section.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* out: return 1 on success else 0 on error
* Clobber list : x1 - x4
* -----------------------------------------------
*/
func console_init
/* Check the input base address */
cbz x0, init_fail
adrp x3, console_base
str x0, [x3, :lo12:console_base]
b console_core_init
init_fail:
ret
endfunc console_init
/* -----------------------------------------------
* void console_uninit(void)
* Function to finish the use of console driver.
* It sets the console_base as NULL so that any
* further invocation of `console_putc` or
* `console_getc` APIs would return error.
* -----------------------------------------------
*/
func console_uninit
mov x0, #0
adrp x3, console_base
str x0, [x3, :lo12:console_base]
ret
endfunc console_uninit
/* ---------------------------------------------
* int console_putc(int c)
* Function to output a character over the
* console. It returns the character printed on
* success or -1 on error.
* In : x0 - character to be printed
* Out : return -1 on error else return character.
* Clobber list : x1, x2
* ---------------------------------------------
*/
func console_putc
adrp x2, console_base
ldr x1, [x2, :lo12:console_base]
b console_core_putc
endfunc console_putc
/* ---------------------------------------------
* int console_getc(void)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_getc
adrp x1, console_base
ldr x0, [x1, :lo12:console_base]
b console_core_getc
endfunc console_getc

106
drivers/console/aarch64/skeleton_console.S Normal file
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@ -0,0 +1,106 @@
/*
* Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <asm_macros.S>
/*
* This file contains a skeleton console implementation that can
* be used as basis for a real console implementation by platforms
* that do not contain PL011 hardware.
*/
.globl console_core_init
.globl console_core_putc
.globl console_core_getc
/* -----------------------------------------------
* int console_core_init(uintptr_t base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. This
* function will be accessed by console_init and
* crash reporting.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* Out: return 1 on success else 0 on error
* Clobber list : x1, x2
* -----------------------------------------------
*/
func console_core_init
/* Check the input base address */
cbz x0, core_init_fail
/* Check baud rate and uart clock for sanity */
cbz w1, core_init_fail
cbz w2, core_init_fail
/* Insert implementation here */
mov w0, #1
ret
core_init_fail:
mov w0, wzr
ret
endfunc console_core_init
/* --------------------------------------------------------
* int console_core_putc(int c, uintptr_t base_addr)
* Function to output a character over the console. It
* returns the character printed on success or -1 on error.
* In : w0 - character to be printed
* x1 - console base address
* Out : return -1 on error else return character.
* Clobber list : x2
* --------------------------------------------------------
*/
func console_core_putc
/* Check the input parameter */
cbz x1, putc_error
/* Insert implementation here */
ret
putc_error:
mov w0, #-1
ret
endfunc console_core_putc
/* ---------------------------------------------
* int console_core_getc(uintptr_t base_addr)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* In : x0 - console base address
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_core_getc
cbz x0, getc_error
/* Insert implementation here */
ret
getc_error:
mov w0, #-1
ret
endfunc console_core_getc

88
drivers/console/console.S
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@ -27,87 +27,7 @@
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <asm_macros.S>
.globl console_init
.globl console_uninit
.globl console_putc
.globl console_getc
/*
* The console base is in the data section and not in .bss
* even though it is zero-init. In particular, this allows
* the console functions to start using this variable before
* the runtime memory is initialized for images which do not
* need to copy the .data section from ROM to RAM.
*/
.section .data.console_base ; .align 3
console_base: .quad 0x0
/* -----------------------------------------------
* int console_init(uintptr_t base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. It saves
* the console base to the data section.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* out: return 1 on success else 0 on error
* Clobber list : x1 - x4
* -----------------------------------------------
*/
func console_init
/* Check the input base address */
cbz x0, init_fail
adrp x3, console_base
str x0, [x3, :lo12:console_base]
b console_core_init
init_fail:
ret
endfunc console_init
/* -----------------------------------------------
* void console_uninit(void)
* Function to finish the use of console driver.
* It sets the console_base as NULL so that any
* further invocation of `console_putc` or
* `console_getc` APIs would return error.
* -----------------------------------------------
*/
func console_uninit
mov x0, #0
adrp x3, console_base
str x0, [x3, :lo12:console_base]
ret
endfunc console_uninit
/* ---------------------------------------------
* int console_putc(int c)
* Function to output a character over the
* console. It returns the character printed on
* success or -1 on error.
* In : x0 - character to be printed
* Out : return -1 on error else return character.
* Clobber list : x1, x2
* ---------------------------------------------
*/
func console_putc
adrp x2, console_base
ldr x1, [x2, :lo12:console_base]
b console_core_putc
endfunc console_putc
/* ---------------------------------------------
* int console_getc(void)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_getc
adrp x1, console_base
ldr x0, [x1, :lo12:console_base]
b console_core_getc
endfunc console_getc
#if !ERROR_DEPRECATED
#include "./aarch64/console.S"
#endif

81
drivers/console/skeleton_console.S
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@ -27,80 +27,7 @@
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <asm_macros.S>
/*
* This file contains a skeleton console implementation that can
* be used as basis for a real console implementation by platforms
* that do not contain PL011 hardware.
*/
.globl console_core_init
.globl console_core_putc
.globl console_core_getc
/* -----------------------------------------------
* int console_core_init(uintptr_t base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. This
* function will be accessed by console_init and
* crash reporting.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* Out: return 1 on success else 0 on error
* Clobber list : x1, x2
* -----------------------------------------------
*/
func console_core_init
/* Check the input base address */
cbz x0, core_init_fail
/* Check baud rate and uart clock for sanity */
cbz w1, core_init_fail
cbz w2, core_init_fail
/* Insert implementation here */
mov w0, #1
ret
core_init_fail:
mov w0, wzr
ret
endfunc console_core_init
/* --------------------------------------------------------
* int console_core_putc(int c, uintptr_t base_addr)
* Function to output a character over the console. It
* returns the character printed on success or -1 on error.
* In : w0 - character to be printed
* x1 - console base address
* Out : return -1 on error else return character.
* Clobber list : x2
* --------------------------------------------------------
*/
func console_core_putc
/* Check the input parameter */
cbz x1, putc_error
/* Insert implementation here */
ret
putc_error:
mov w0, #-1
ret
endfunc console_core_putc
/* ---------------------------------------------
* int console_core_getc(uintptr_t base_addr)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* In : x0 - console base address
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_core_getc
cbz x0, getc_error
/* Insert implementation here */
ret
getc_error:
mov w0, #-1
ret
endfunc console_core_getc
#if !ERROR_DEPRECATED
#include "./aarch64/skeleton_console.S"
#endif

130
drivers/ti/uart/16550_console.S
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@ -28,128 +28,6 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <asm_macros.S>
#include <uart_16550.h>
.globl console_core_init
.globl console_core_putc
.globl console_core_getc
/* -----------------------------------------------
* int console_core_init(unsigned long base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. This
* function will be accessed by console_init and
* crash reporting.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* Out: return 1 on success
* Clobber list : x1, x2, x3
* -----------------------------------------------
*/
func console_core_init
/* Check the input base address */
cbz x0, init_fail
/* Check baud rate and uart clock for sanity */
cbz w1, init_fail
cbz w2, init_fail
/* Program the baudrate */
/* Divisor = Uart clock / (16 * baudrate) */
lsl w2, w2, #4
udiv w2, w1, w2
and w1, w2, #0xff /* w1 = DLL */
lsr w2, w2, #8
and w2, w2, #0xff /* w2 = DLLM */
ldr w3, [x0, #UARTLCR]
orr w3, w3, #UARTLCR_DLAB
str w3, [x0, #UARTLCR] /* enable DLL, DLLM programming */
str w1, [x0, #UARTDLL] /* program DLL */
str w2, [x0, #UARTDLLM] /* program DLLM */
mov w2, #~UARTLCR_DLAB
and w3, w3, w2
str w3, [x0, #UARTLCR] /* disable DLL, DLLM programming */
/* 8n1 */
mov w3, #3
str w3, [x0, #UARTLCR]
/* no interrupt */
mov w3, #0
str w3, [x0, #UARTIER]
/* enable fifo, DMA */
mov w3, #(UARTFCR_FIFOEN | UARTFCR_DMAEN)
str w3, [x0, #UARTFCR]
/* DTR + RTS */
mov w3, #3
str w3, [x0, #UARTMCR]
mov w0, #1
init_fail:
ret
endfunc console_core_init
/* --------------------------------------------------------
* int console_core_putc(int c, unsigned int base_addr)
* Function to output a character over the console. It
* returns the character printed on success or -1 on error.
* In : w0 - character to be printed
* x1 - console base address
* Out : return -1 on error else return character.
* Clobber list : x2
* --------------------------------------------------------
*/
func console_core_putc
/* Check the input parameter */
cbz x1, putc_error
/* Prepend '\r' to '\n' */
cmp w0, #0xA
b.ne 2f
/* Check if the transmit FIFO is full */
1: ldr w2, [x1, #UARTLSR]
and w2, w2, #(UARTLSR_TEMT | UARTLSR_THRE)
cmp w2, #(UARTLSR_TEMT | UARTLSR_THRE)
b.ne 1b
mov w2, #0xD /* '\r' */
str w2, [x1, #UARTTX]
ldr w2, [x1, #UARTFCR]
orr w2, w2, #UARTFCR_TXCLR
str w2, [x1, #UARTFCR]
/* Check if the transmit FIFO is full */
2: ldr w2, [x1, #UARTLSR]
and w2, w2, #(UARTLSR_TEMT | UARTLSR_THRE)
cmp w2, #(UARTLSR_TEMT | UARTLSR_THRE)
b.ne 2b
str w0, [x1, #UARTTX]
ldr w2, [x1, #UARTFCR]
orr w2, w2, #UARTFCR_TXCLR
str w2, [x1, #UARTFCR]
ret
putc_error:
mov w0, #-1
ret
endfunc console_core_putc
/* ---------------------------------------------
* int console_core_getc(void)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* In : w0 - console base address
* Out : return -1 on error else return character.
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_core_getc
/* Check if the receive FIFO is empty */
1: ldr w1, [x0, #UARTLSR]
tbz w1, #UARTLSR_RDR, 1b
ldr w0, [x0, #UARTRX]
ret
getc_error:
mov w0, #-1
ret
endfunc console_core_getc
#if !ERROR_DEPRECATED
#include "./aarch64/16550_console.S"
#endif

155
drivers/ti/uart/aarch64/16550_console.S Normal file
View file

@ -0,0 +1,155 @@
/*
* Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <asm_macros.S>
#include <uart_16550.h>
.globl console_core_init
.globl console_core_putc
.globl console_core_getc
/* -----------------------------------------------
* int console_core_init(unsigned long base_addr,
* unsigned int uart_clk, unsigned int baud_rate)
* Function to initialize the console without a
* C Runtime to print debug information. This
* function will be accessed by console_init and
* crash reporting.
* In: x0 - console base address
* w1 - Uart clock in Hz
* w2 - Baud rate
* Out: return 1 on success
* Clobber list : x1, x2, x3
* -----------------------------------------------
*/
func console_core_init
/* Check the input base address */
cbz x0, init_fail
/* Check baud rate and uart clock for sanity */
cbz w1, init_fail
cbz w2, init_fail
/* Program the baudrate */
/* Divisor = Uart clock / (16 * baudrate) */
lsl w2, w2, #4
udiv w2, w1, w2
and w1, w2, #0xff /* w1 = DLL */
lsr w2, w2, #8
and w2, w2, #0xff /* w2 = DLLM */
ldr w3, [x0, #UARTLCR]
orr w3, w3, #UARTLCR_DLAB
str w3, [x0, #UARTLCR] /* enable DLL, DLLM programming */
str w1, [x0, #UARTDLL] /* program DLL */
str w2, [x0, #UARTDLLM] /* program DLLM */
mov w2, #~UARTLCR_DLAB
and w3, w3, w2
str w3, [x0, #UARTLCR] /* disable DLL, DLLM programming */
/* 8n1 */
mov w3, #3
str w3, [x0, #UARTLCR]
/* no interrupt */
mov w3, #0
str w3, [x0, #UARTIER]
/* enable fifo, DMA */
mov w3, #(UARTFCR_FIFOEN | UARTFCR_DMAEN)
str w3, [x0, #UARTFCR]
/* DTR + RTS */
mov w3, #3
str w3, [x0, #UARTMCR]
mov w0, #1
init_fail:
ret
endfunc console_core_init
/* --------------------------------------------------------
* int console_core_putc(int c, unsigned int base_addr)
* Function to output a character over the console. It
* returns the character printed on success or -1 on error.
* In : w0 - character to be printed
* x1 - console base address
* Out : return -1 on error else return character.
* Clobber list : x2
* --------------------------------------------------------
*/
func console_core_putc
/* Check the input parameter */
cbz x1, putc_error
/* Prepend '\r' to '\n' */
cmp w0, #0xA
b.ne 2f
/* Check if the transmit FIFO is full */
1: ldr w2, [x1, #UARTLSR]
and w2, w2, #(UARTLSR_TEMT | UARTLSR_THRE)
cmp w2, #(UARTLSR_TEMT | UARTLSR_THRE)
b.ne 1b
mov w2, #0xD /* '\r' */
str w2, [x1, #UARTTX]
ldr w2, [x1, #UARTFCR]
orr w2, w2, #UARTFCR_TXCLR
str w2, [x1, #UARTFCR]
/* Check if the transmit FIFO is full */
2: ldr w2, [x1, #UARTLSR]
and w2, w2, #(UARTLSR_TEMT | UARTLSR_THRE)
cmp w2, #(UARTLSR_TEMT | UARTLSR_THRE)
b.ne 2b
str w0, [x1, #UARTTX]
ldr w2, [x1, #UARTFCR]
orr w2, w2, #UARTFCR_TXCLR
str w2, [x1, #UARTFCR]
ret
putc_error:
mov w0, #-1
ret
endfunc console_core_putc
/* ---------------------------------------------
* int console_core_getc(void)
* Function to get a character from the console.
* It returns the character grabbed on success
* or -1 on error.
* In : w0 - console base address
* Out : return -1 on error else return character.
* Clobber list : x0, x1
* ---------------------------------------------
*/
func console_core_getc
/* Check if the receive FIFO is empty */
1: ldr w1, [x0, #UARTLSR]
tbz w1, #UARTLSR_RDR, 1b
ldr w0, [x0, #UARTRX]
ret
getc_error:
mov w0, #-1
ret
endfunc console_core_getc