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linux-pinenote/arch/arm/mach-omap1/include/mach/debug-macro.S

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omap: headers: Split debug-macro.S for mach-omap1 and mach-omap2 This also creates the include/mach subdirectories under mach-omap1 and mach-omap2. Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-10-19 17:26:17 -07:00
/* arch/arm/mach-omap1/include/mach/debug-macro.S
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
*
* 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.
*
*/
omap: Clean the serial port defines This way we don't have conflicts with the defines with compiling in multiple omaps. Set the addresses for uarts in struct omap_globals for the early serial init code. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:48:53 -08:00
#include <linux/serial_reg.h>
omap: Use a memory address for storing the debug port info instead of UART1 scratchpad This removes the dependency to the UART1 being available for storing the debug configuration in uncompress.h. This will simplify the DEBUG_LL UART configuration for boards that may not have UART1, or have an external UART as it requires only one mapping for DEBUG_LL. The patch has a few limitations. Basically now we're assuming that the kernel uncompress code won't overlap with OMAP_UART_INFO. We also assume the printascii is called at least once before paging_init in order for addruart to have a chance to read the UART setup from OMAP_UART_INFO. As suggested by Cyril Chemparathy <cyril@ti.com>, Vikram Pandita <vikram.pandita@ti.com> and Kevin Hilman <khilman@deeprootsystems.com>. Based on an earlier patch posted for Davinci by Cyril Chemparathy <cyril@ti.com>. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-04-30 17:39:19 -07:00
#include <asm/memory.h>
omap: Clean the serial port defines This way we don't have conflicts with the defines with compiling in multiple omaps. Set the addresses for uarts in struct omap_globals for the early serial init code. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:48:53 -08:00
#include <plat/serial.h>
omap: Make uncompress code and DEBUG_LL code generic Define arch_decomp_setup() the same way as some other architectures do. Use arch_id to configure the debug uart based on the machine_is by storing it into the uart scratchpad register for DEBUG_LL code to use. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:49:01 -08:00
.pushsection .data
omap_uart_phys: .word 0x0
omap_uart_virt: .word 0x0
.popsection
/*
* Note that this code won't work if the bootloader passes
* a wrong machine ID number in r1. To debug, just hardcode
* the desired UART phys and virt addresses temporarily into
* the omap_uart_phys and omap_uart_virt above.
*/
ARM: 5910/1: ARM: Add tmp register for addruart and loadsp Otherwise more complicated uart configuration won't be possible. We can use r1 for tmp register for both head.S and debug.S. NOTE: This patch depends on another patch to add the the tmp register into all debug-macro.S files. That can be done with: $ sed -i -e "s/addruart,rx|addruart, rx/addruart, rx, tmp/" arch/arm/*/include/*/debug-macro.S Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-02-01 23:26:53 +01:00
.macro addruart, rx, tmp
omap: Make uncompress code and DEBUG_LL code generic Define arch_decomp_setup() the same way as some other architectures do. Use arch_id to configure the debug uart based on the machine_is by storing it into the uart scratchpad register for DEBUG_LL code to use. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:49:01 -08:00
/* Use omap_uart_phys/virt if already configured */
9: mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
omap: Fix DEBUG_LL uart to access phys addr when MMU isn't enable Now we use a memory address to store the debug port info, So we need to read/write this address when we choose DEBUG_LL. When MMU isn't enable(I.E. the begining part of init stage of the linux kernel boot), we need to access physical address instead of virtual address, otherwise the kernel will crash. Signed-off-by: Jason Wang <jason77.wang@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-08-03 11:44:18 +08:00
ldreq \rx, =__virt_to_phys(omap_uart_phys) @ physical base address
omap: Make uncompress code and DEBUG_LL code generic Define arch_decomp_setup() the same way as some other architectures do. Use arch_id to configure the debug uart based on the machine_is by storing it into the uart scratchpad register for DEBUG_LL code to use. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:49:01 -08:00
ldrne \rx, =omap_uart_virt @ virtual base
ldr \rx, [\rx, #0]
cmp \rx, #0 @ is port configured?
bne 99f @ already configured
omap: Use a memory address for storing the debug port info instead of UART1 scratchpad This removes the dependency to the UART1 being available for storing the debug configuration in uncompress.h. This will simplify the DEBUG_LL UART configuration for boards that may not have UART1, or have an external UART as it requires only one mapping for DEBUG_LL. The patch has a few limitations. Basically now we're assuming that the kernel uncompress code won't overlap with OMAP_UART_INFO. We also assume the printascii is called at least once before paging_init in order for addruart to have a chance to read the UART setup from OMAP_UART_INFO. As suggested by Cyril Chemparathy <cyril@ti.com>, Vikram Pandita <vikram.pandita@ti.com> and Kevin Hilman <khilman@deeprootsystems.com>. Based on an earlier patch posted for Davinci by Cyril Chemparathy <cyril@ti.com>. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-04-30 17:39:19 -07:00
/* Check the debug UART configuration set in uncompress.h */
omap: Make uncompress code and DEBUG_LL code generic Define arch_decomp_setup() the same way as some other architectures do. Use arch_id to configure the debug uart based on the machine_is by storing it into the uart scratchpad register for DEBUG_LL code to use. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:49:01 -08:00
mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
omap: Use a memory address for storing the debug port info instead of UART1 scratchpad This removes the dependency to the UART1 being available for storing the debug configuration in uncompress.h. This will simplify the DEBUG_LL UART configuration for boards that may not have UART1, or have an external UART as it requires only one mapping for DEBUG_LL. The patch has a few limitations. Basically now we're assuming that the kernel uncompress code won't overlap with OMAP_UART_INFO. We also assume the printascii is called at least once before paging_init in order for addruart to have a chance to read the UART setup from OMAP_UART_INFO. As suggested by Cyril Chemparathy <cyril@ti.com>, Vikram Pandita <vikram.pandita@ti.com> and Kevin Hilman <khilman@deeprootsystems.com>. Based on an earlier patch posted for Davinci by Cyril Chemparathy <cyril@ti.com>. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-04-30 17:39:19 -07:00
ldreq \rx, =OMAP_UART_INFO
ldrne \rx, =__phys_to_virt(OMAP_UART_INFO)
ldr \rx, [\rx, #0]
omap: Make uncompress code and DEBUG_LL code generic Define arch_decomp_setup() the same way as some other architectures do. Use arch_id to configure the debug uart based on the machine_is by storing it into the uart scratchpad register for DEBUG_LL code to use. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:49:01 -08:00
/* Select the UART to use based on the UART1 scratchpad value */
10: cmp \rx, #0 @ no port configured?
beq 11f @ if none, try to use UART1
cmp \rx, #OMAP1UART1
beq 11f @ configure OMAP1UART1
cmp \rx, #OMAP1UART2
beq 12f @ configure OMAP1UART2
cmp \rx, #OMAP1UART3
beq 13f @ configure OMAP2UART3
/* Configure the UART offset from the phys/virt base */
11: mov \rx, #0x00fb0000 @ OMAP1UART1
b 98f
12: mov \rx, #0x00fb0000 @ OMAP1UART1
orr \rx, \rx, #0x00000800 @ OMAP1UART2
b 98f
13: mov \rx, #0x00fb0000 @ OMAP1UART1
orr \rx, \rx, #0x00000800 @ OMAP1UART2
orr \rx, \rx, #0x00009000 @ OMAP1UART3
/* Store both phys and virt address for the uart */
98: add \rx, \rx, #0xff000000 @ phys base
omap: Fix DEBUG_LL uart to access phys addr when MMU isn't enable Now we use a memory address to store the debug port info, So we need to read/write this address when we choose DEBUG_LL. When MMU isn't enable(I.E. the begining part of init stage of the linux kernel boot), we need to access physical address instead of virtual address, otherwise the kernel will crash. Signed-off-by: Jason Wang <jason77.wang@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-08-03 11:44:18 +08:00
mrc p15, 0, \tmp, c1, c0
tst \tmp, #1 @ MMU enabled?
ldreq \tmp, =__virt_to_phys(omap_uart_phys)
ldrne \tmp, =omap_uart_phys
omap: Make uncompress code and DEBUG_LL code generic Define arch_decomp_setup() the same way as some other architectures do. Use arch_id to configure the debug uart based on the machine_is by storing it into the uart scratchpad register for DEBUG_LL code to use. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:49:01 -08:00
str \rx, [\tmp, #0]
sub \rx, \rx, #0xff000000 @ phys base
add \rx, \rx, #0xfe000000 @ virt base
omap: Fix DEBUG_LL uart to access phys addr when MMU isn't enable Now we use a memory address to store the debug port info, So we need to read/write this address when we choose DEBUG_LL. When MMU isn't enable(I.E. the begining part of init stage of the linux kernel boot), we need to access physical address instead of virtual address, otherwise the kernel will crash. Signed-off-by: Jason Wang <jason77.wang@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-08-03 11:44:18 +08:00
ldreq \tmp, =__virt_to_phys(omap_uart_virt)
ldrne \tmp, =omap_uart_virt
omap: Make uncompress code and DEBUG_LL code generic Define arch_decomp_setup() the same way as some other architectures do. Use arch_id to configure the debug uart based on the machine_is by storing it into the uart scratchpad register for DEBUG_LL code to use. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:49:01 -08:00
str \rx, [\tmp, #0]
b 9b
99:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
.endm
.macro senduart,rd,rx
strb \rd, [\rx]
.endm
.macro busyuart,rd,rx
omap: Clean the serial port defines This way we don't have conflicts with the defines with compiling in multiple omaps. Set the addresses for uarts in struct omap_globals for the early serial init code. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:48:53 -08:00
1001: ldrb \rd, [\rx, #(UART_LSR << OMAP_PORT_SHIFT)]
and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
beq 1002f
omap: Clean the serial port defines This way we don't have conflicts with the defines with compiling in multiple omaps. Set the addresses for uarts in struct omap_globals for the early serial init code. Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-02-15 08:48:53 -08:00
ldrb \rd, [\rx, #(UART_LSR << OMAP7XX_PORT_SHIFT)]
and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 15:20:36 -07:00
bne 1001b
1002:
.endm
.macro waituart,rd,rx
.endm
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