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Diffstat (limited to 'lib/aarch64/cache_helpers.S')
| -rw-r--r-- | lib/aarch64/cache_helpers.S | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/lib/aarch64/cache_helpers.S b/lib/aarch64/cache_helpers.S new file mode 100644 index 0000000..04caac4 --- /dev/null +++ b/lib/aarch64/cache_helpers.S @@ -0,0 +1,245 @@ +/* + * Copyright (c) 2013-2014, 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> + + .globl dcisw + .globl dccisw + .globl dccsw + .globl dccvac + .globl dcivac + .globl dccivac + .globl dccvau + .globl dczva + .globl flush_dcache_range + .globl inv_dcache_range + .globl dcsw_op_louis + .globl dcsw_op_all + + .global _clean_dcache_addr + .global _clean_invd_dcache_addr + .globl platform_stack_set_bl2 + + .type platform_stack_set_bl2, @function +platform_stack_set_bl2: + mov x9, x30 //lr + mov sp, x0 + ret x9 + +func dcisw + dc isw, x0 + ret + + +func dccisw + dc cisw, x0 + ret + + +func dccsw + dc csw, x0 + ret + + +func dccvac + dc cvac, x0 + ret + + +func dcivac + dc ivac, x0 + ret + + +func dccivac + dc civac, x0 + ret + + +func dccvau + dc cvau, x0 + ret + + +func dczva + dc zva, x0 + ret + + + /* ------------------------------------------ + * Clean+Invalidate from base address till + * size. 'x0' = addr, 'x1' = size + * ------------------------------------------ + */ +func flush_dcache_range + dcache_line_size x2, x3 + add x1, x0, x1 + sub x3, x2, #1 + bic x0, x0, x3 +flush_loop: + dc civac, x0 + add x0, x0, x2 + cmp x0, x1 + b.lo flush_loop + dsb sy + ret + + + /* ------------------------------------------ + * Invalidate from base address till + * size. 'x0' = addr, 'x1' = size + * ------------------------------------------ + */ +func inv_dcache_range + dcache_line_size x2, x3 + add x1, x0, x1 + sub x3, x2, #1 + bic x0, x0, x3 +inv_loop: + dc ivac, x0 + add x0, x0, x2 + cmp x0, x1 + b.lo inv_loop + dsb sy + ret + + + /* --------------------------------------------------------------- + * Data cache operations by set/way to the level specified + * + * The main function, do_dcsw_op requires: + * x0: The operation type (0-2), as defined in arch.h + * x3: The last cache level to operate on + * x9: clidr_el1 + * and will carry out the operation on each data cache from level 0 + * to the level in x3 in sequence + * + * The dcsw_op macro sets up the x3 and x9 parameters based on + * clidr_el1 cache information before invoking the main function + * --------------------------------------------------------------- + */ + + .macro dcsw_op shift, fw, ls + mrs x9, clidr_el1 + ubfx x3, x9, \shift, \fw + lsl x3, x3, \ls + b do_dcsw_op + .endm + +func do_dcsw_op + cbz x3, exit + mov x10, xzr + adr x14, dcsw_loop_table // compute inner loop address + add x14, x14, x0, lsl #5 // inner loop is 8x32-bit instructions + mov x0, x9 + mov w8, #1 +loop1: + add x2, x10, x10, lsr #1 // work out 3x current cache level + lsr x1, x0, x2 // extract cache type bits from clidr + and x1, x1, #7 // mask the bits for current cache only + cmp x1, #2 // see what cache we have at this level + b.lt level_done // nothing to do if no cache or icache + + msr csselr_el1, x10 // select current cache level in csselr + isb // isb to sych the new cssr&csidr + mrs x1, ccsidr_el1 // read the new ccsidr + and x2, x1, #7 // extract the length of the cache lines + add x2, x2, #4 // add 4 (line length offset) + ubfx x4, x1, #3, #10 // maximum way number + clz w5, w4 // bit position of way size increment + lsl w9, w4, w5 // w9 = aligned max way number + lsl w16, w8, w5 // w16 = way number loop decrement + orr w9, w10, w9 // w9 = combine way and cache number + ubfx w6, w1, #13, #15 // w6 = max set number + lsl w17, w8, w2 // w17 = set number loop decrement + dsb sy // barrier before we start this level + br x14 // jump to DC operation specific loop + + .macro dcsw_loop _op +loop2_\_op: + lsl w7, w6, w2 // w7 = aligned max set number + +loop3_\_op: + orr w11, w9, w7 // combine cache, way and set number + dc \_op, x11 + subs w7, w7, w17 // decrement set number + b.ge loop3_\_op + + subs x9, x9, x16 // decrement way number + b.ge loop2_\_op + + b level_done + .endm + +level_done: + add x10, x10, #2 // increment cache number + cmp x3, x10 + b.gt loop1 + msr csselr_el1, xzr // select cache level 0 in csselr + dsb sy // barrier to complete final cache operation + isb +exit: + ret + +dcsw_loop_table: + dcsw_loop isw + dcsw_loop cisw + dcsw_loop csw + + +func dcsw_op_louis + dcsw_op #LOUIS_SHIFT, #CLIDR_FIELD_WIDTH, #LEVEL_SHIFT + + +func dcsw_op_all + dcsw_op #LOC_SHIFT, #CLIDR_FIELD_WIDTH, #LEVEL_SHIFT + + +#if 0 +//============================================== +// void _clean_dcache_addr(unsigned long addr) +// clean dcache by VA +//============================================== + .type _clean_dcache_addr, @function +_clean_dcache_addr: + dc cvac, x0 + dsb sy + ret +//============================================== +// void _clean_invd_dcache_addr(unsigned long addr) +// clean&invalid dcache by VA +//============================================== + .type _clean_invd_dcache_addr, @function +_clean_invd_dcache_addr: + dc civac, x0 + dsb sy + ret +#endif |