diff options
author | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2017-02-06 16:03:41 +0000 |
---|---|---|
committer | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2017-03-31 09:54:21 +0100 |
commit | 73e052846ab4c45194d639ab65b523448a7d7edd (patch) | |
tree | 31f282afacd0d8c9836d345a691d675bc1cedf52 /drivers/console | |
parent | e422f991df48306cd5d9629c4f1ed230b0807fdb (diff) |
Add console_flush() to console API
This function ensures that console output is flushed, for example
before shutting down or use by another component
In line with other console APIs, console_flush() wraps
console_core_flush().
Also implement console_core_flush() for PL011.
Change-Id: I3db365065e4de04a454a5c2ce21be335a23a01e4
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Diffstat (limited to 'drivers/console')
-rw-r--r-- | drivers/console/aarch32/console.S | 18 | ||||
-rw-r--r-- | drivers/console/aarch32/skeleton_console.S | 23 | ||||
-rw-r--r-- | drivers/console/aarch64/console.S | 18 | ||||
-rw-r--r-- | drivers/console/aarch64/skeleton_console.S | 22 |
4 files changed, 77 insertions, 4 deletions
diff --git a/drivers/console/aarch32/console.S b/drivers/console/aarch32/console.S index 29933452..6f85a21f 100644 --- a/drivers/console/aarch32/console.S +++ b/drivers/console/aarch32/console.S @@ -1,5 +1,5 @@ /* - * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2016-2017, 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: @@ -33,6 +33,7 @@ .globl console_uninit .globl console_putc .globl console_getc + .globl console_flush /* * The console base is in the data section and not in .bss @@ -112,3 +113,18 @@ func console_getc ldr r0, [r1] b console_core_getc endfunc console_getc + + /* --------------------------------------------- + * int console_flush(void) + * Function to force a write of all buffered + * data that hasn't been output. It returns 0 + * upon successful completion, otherwise it + * returns -1. + * Clobber list : r0, r1 + * --------------------------------------------- + */ +func console_flush + ldr r1, =console_base + ldr r0, [r1] + b console_core_flush +endfunc console_flush diff --git a/drivers/console/aarch32/skeleton_console.S b/drivers/console/aarch32/skeleton_console.S index 383874e6..0b60bc75 100644 --- a/drivers/console/aarch32/skeleton_console.S +++ b/drivers/console/aarch32/skeleton_console.S @@ -1,5 +1,5 @@ /* - * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2016-2017, 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: @@ -38,6 +38,7 @@ .globl console_core_init .globl console_core_putc .globl console_core_getc + .globl console_core_flush /* ----------------------------------------------- * int console_core_init(uintptr_t base_addr, @@ -109,3 +110,23 @@ getc_error: mov r0, #-1 bx lr endfunc console_core_getc + + /* --------------------------------------------- + * int console_core_flush(uintptr_t base_addr) + * Function to force a write of all buffered + * data that hasn't been output. + * In : r0 - console base address + * Out : return -1 on error else return 0. + * Clobber list : r0, r1 + * --------------------------------------------- + */ +func console_core_flush + cmp r0, #0 + beq flush_error + /* Insert implementation here */ + mov r0, #0 + bx lr +flush_error: + mov r0, #-1 + bx lr +endfunc console_core_flush diff --git a/drivers/console/aarch64/console.S b/drivers/console/aarch64/console.S index bdd5f4c3..cd6579cf 100644 --- a/drivers/console/aarch64/console.S +++ b/drivers/console/aarch64/console.S @@ -1,5 +1,5 @@ /* - * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2015-2017, 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: @@ -33,6 +33,7 @@ .globl console_uninit .globl console_putc .globl console_getc + .globl console_flush /* * The console base is in the data section and not in .bss @@ -111,3 +112,18 @@ func console_getc ldr x0, [x1, :lo12:console_base] b console_core_getc endfunc console_getc + + /* --------------------------------------------- + * int console_flush(void) + * Function to force a write of all buffered + * data that hasn't been output. It returns 0 + * upon successful completion, otherwise it + * returns -1. + * Clobber list : x0, x1 + * --------------------------------------------- + */ +func console_flush + adrp x1, console_base + ldr x0, [x1, :lo12:console_base] + b console_core_flush +endfunc console_flush diff --git a/drivers/console/aarch64/skeleton_console.S b/drivers/console/aarch64/skeleton_console.S index 1583ee7d..01a42672 100644 --- a/drivers/console/aarch64/skeleton_console.S +++ b/drivers/console/aarch64/skeleton_console.S @@ -1,5 +1,5 @@ /* - * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2015-2017, 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: @@ -38,6 +38,7 @@ .globl console_core_init .globl console_core_putc .globl console_core_getc + .globl console_core_flush /* ----------------------------------------------- * int console_core_init(uintptr_t base_addr, @@ -104,3 +105,22 @@ getc_error: mov w0, #-1 ret endfunc console_core_getc + + /* --------------------------------------------- + * int console_core_flush(uintptr_t base_addr) + * Function to force a write of all buffered + * data that hasn't been output. + * In : x0 - console base address + * Out : return -1 on error else return 0. + * Clobber list : x0, x1 + * --------------------------------------------- + */ +func console_core_flush + cbz x0, flush_error + /* Insert implementation here */ + mov w0, #0 + ret +flush_error: + mov w0, #-1 + ret +endfunc console_core_flush |