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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/arm/mach-omap2/include/mach/debug-macro.S
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/arm/mach-omap2/include/mach/debug-macro.S')
-rw-r--r--arch/arm/mach-omap2/include/mach/debug-macro.S150
1 files changed, 150 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/include/mach/debug-macro.S b/arch/arm/mach-omap2/include/mach/debug-macro.S
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+/* arch/arm/mach-omap2/include/mach/debug-macro.S
+ *
+ * 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>
+
+#include <plat/serial.h>
+
+#define UART_OFFSET(addr) ((addr) & 0x00ffffff)
+
+ .pushsection .data
+omap_uart_phys: .word 0
+omap_uart_virt: .word 0
+omap_uart_lsr: .word 0
+ .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.
+ */
+ .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
+
+ /* Check the debug UART configuration set in uncompress.h */
+ mov \rp, pc
+ ldr \rv, =OMAP_UART_INFO_OFS
+ and \rp, \rp, #0xff000000
+ ldr \rp, [\rp, \rv]
+
+ /* Select the UART to use based on the UART1 scratchpad value */
+ cmp \rp, #0 @ no port configured?
+ beq 21f @ if none, try to use UART1
+ cmp \rp, #OMAP2UART1 @ OMAP2/3/4UART1
+ beq 21f @ configure OMAP2/3/4UART1
+ cmp \rp, #OMAP2UART2 @ OMAP2/3/4UART2
+ beq 22f @ configure OMAP2/3/4UART2
+ cmp \rp, #OMAP2UART3 @ only on 24xx
+ beq 23f @ configure OMAP2UART3
+ cmp \rp, #OMAP3UART3 @ only on 34xx
+ beq 33f @ configure OMAP3UART3
+ cmp \rp, #OMAP4UART3 @ only on 44xx
+ beq 43f @ configure OMAP4UART3
+ cmp \rp, #OMAP3UART4 @ only on 36xx
+ beq 34f @ configure OMAP3UART4
+ cmp \rp, #OMAP4UART4 @ only on 44xx
+ beq 44f @ configure OMAP4UART4
+ cmp \rp, #TI81XXUART1 @ ti81Xx UART offsets different
+ beq 81f @ configure UART1
+ cmp \rp, #TI81XXUART2 @ ti81Xx UART offsets different
+ beq 82f @ configure UART2
+ cmp \rp, #TI81XXUART3 @ ti81Xx UART offsets different
+ beq 83f @ configure UART3
+ cmp \rp, #ZOOM_UART @ only on zoom2/3
+ beq 95f @ configure ZOOM_UART
+
+ /* Configure the UART offset from the phys/virt base */
+21: mov \rp, #UART_OFFSET(OMAP2_UART1_BASE) @ omap2/3/4
+ b 98f
+22: mov \rp, #UART_OFFSET(OMAP2_UART2_BASE) @ omap2/3/4
+ b 98f
+23: mov \rp, #UART_OFFSET(OMAP2_UART3_BASE)
+ b 98f
+33: mov \rp, #UART_OFFSET(OMAP3_UART1_BASE)
+ add \rp, \rp, #0x00fb0000
+ add \rp, \rp, #0x00006000 @ OMAP3_UART3_BASE
+ b 98f
+34: mov \rp, #UART_OFFSET(OMAP3_UART1_BASE)
+ add \rp, \rp, #0x00fb0000
+ add \rp, \rp, #0x00028000 @ OMAP3_UART4_BASE
+ b 98f
+43: mov \rp, #UART_OFFSET(OMAP4_UART3_BASE)
+ b 98f
+44: mov \rp, #UART_OFFSET(OMAP4_UART4_BASE)
+ b 98f
+81: mov \rp, #UART_OFFSET(TI81XX_UART1_BASE)
+ b 98f
+82: mov \rp, #UART_OFFSET(TI81XX_UART2_BASE)
+ b 98f
+83: mov \rp, #UART_OFFSET(TI81XX_UART3_BASE)
+ b 98f
+
+95: 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
+ 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