diff options
| author | Soby Mathew <soby.mathew@arm.com> | 2014-09-02 10:47:33 +0100 |
|---|---|---|
| committer | Soby Mathew <soby.mathew@arm.com> | 2014-10-29 17:38:56 +0000 |
| commit | 8e85791677a334bc7ed0799b18adad91ef3c1db4 (patch) | |
| tree | c08a9348cf5016af8fc31d188f70bfba6e7abff4 /lib/aarch64 | |
| parent | 0f4b06347b4c2a5d018e085f7102fd3cc10ffa88 (diff) | |
Add support for level specific cache maintenance operations
This patch adds level specific cache maintenance functions
to cache_helpers.S. The new functions 'dcsw_op_levelx',
where '1 <= x <= 3', allow to perform cache maintenance by
set/way for that particular level of cache. With this patch,
functions to support cache maintenance upto level 3 have
been implemented since it is the highest cache level for
most ARM SoCs.
These functions are now utilized in CPU specific power down
sequences to implement them as mandated by processor specific
technical reference manual.
Change-Id: Icd90ce6b51cff5a12863bcda01b93601417fd45c
Diffstat (limited to 'lib/aarch64')
| -rw-r--r-- | lib/aarch64/cache_helpers.S | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/lib/aarch64/cache_helpers.S b/lib/aarch64/cache_helpers.S index 1c805504..dc601021 100644 --- a/lib/aarch64/cache_helpers.S +++ b/lib/aarch64/cache_helpers.S @@ -35,6 +35,9 @@ .globl inv_dcache_range .globl dcsw_op_louis .globl dcsw_op_all + .globl dcsw_op_level1 + .globl dcsw_op_level2 + .globl dcsw_op_level3 /* ------------------------------------------ * Clean+Invalidate from base address till @@ -81,6 +84,7 @@ inv_loop: * x0: The operation type (0-2), as defined in arch.h * x3: The last cache level to operate on * x9: clidr_el1 + * x10: The cache level to begin operation from * and will carry out the operation on each data cache from level 0 * to the level in x3 in sequence * @@ -93,12 +97,12 @@ inv_loop: mrs x9, clidr_el1 ubfx x3, x9, \shift, \fw lsl x3, x3, \ls + mov x10, xzr 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 @@ -163,3 +167,45 @@ func dcsw_op_louis func dcsw_op_all dcsw_op #LOC_SHIFT, #CLIDR_FIELD_WIDTH, #LEVEL_SHIFT + + /* --------------------------------------------------------------- + * Helper macro for data cache operations by set/way for the + * level specified + * --------------------------------------------------------------- + */ + .macro dcsw_op_level level + mrs x9, clidr_el1 + mov x3, \level + sub x10, x3, #2 + b do_dcsw_op + .endm + + /* --------------------------------------------------------------- + * Data cache operations by set/way for level 1 cache + * + * The main function, do_dcsw_op requires: + * x0: The operation type (0-2), as defined in arch.h + * --------------------------------------------------------------- + */ +func dcsw_op_level1 + dcsw_op_level #(1 << LEVEL_SHIFT) + + /* --------------------------------------------------------------- + * Data cache operations by set/way for level 2 cache + * + * The main function, do_dcsw_op requires: + * x0: The operation type (0-2), as defined in arch.h + * --------------------------------------------------------------- + */ +func dcsw_op_level2 + dcsw_op_level #(2 << LEVEL_SHIFT) + + /* --------------------------------------------------------------- + * Data cache operations by set/way for level 3 cache + * + * The main function, do_dcsw_op requires: + * x0: The operation type (0-2), as defined in arch.h + * --------------------------------------------------------------- + */ +func dcsw_op_level3 + dcsw_op_level #(3 << LEVEL_SHIFT) |