M7350/bootable/bootloader/lk/arch/arm/dcc.S

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2024-09-09 08:52:07 +00:00
/*
* Copyright (c) 2008 Brian Swetland
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
.global dcc_putc
.global dcc_getc
#if defined(ARM_ISA_ARMV6) || defined(ARM_ISA_ARMV7)
dcc_getc:
mrc 14, 0, r0, c0, c1, 0
tst r0, #(1 << 30)
moveq r0, #-1
mrcne 14, 0, r0, c0, c5, 0
bx lr
dcc_putc:
mrc 14, 0, r15, c0, c1, 0
mcrcc 14, 0, r0, c0, c5, 0
movcc r0, #0
movcs r0, #-1
bx lr
#endif