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riscv: implement ALTERNATIVE_2 macro

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When the alternatives were added the commit already provided a template
on how to implement 2 different alternatives for one piece of code.

Make this usable.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
Link: https://lore.kernel.org/r/20220511192921.2223629-5-heiko@sntech.de
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Heiko Stuebner 2022-05-11 21:29:13 +02:00 committed by Palmer Dabbelt
parent a8e910168b
commit fbdba60b81
No known key found for this signature in database
GPG Key ID: EF4CA1502CCBAB41
1 changed files with 58 additions and 20 deletions
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78
arch/riscv/include/asm/alternative-macros.h
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@ -39,6 +39,24 @@
#define _ALTERNATIVE_CFG(old_c, new_c, vendor_id, errata_id, CONFIG_k) \
__ALTERNATIVE_CFG old_c, new_c, vendor_id, errata_id, IS_ENABLED(CONFIG_k)
.macro __ALTERNATIVE_CFG_2 old_c, new_c_1, vendor_id_1, errata_id_1, enable_1, \
new_c_2, vendor_id_2, errata_id_2, enable_2
886 :
\old_c
887 :
ALT_NEW_CONTENT \vendor_id_1, \errata_id_1, \enable_1, \new_c_1
ALT_NEW_CONTENT \vendor_id_2, \errata_id_2, \enable_2, \new_c_2
.endm
#define _ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1, \
CONFIG_k_1, \
new_c_2, vendor_id_2, errata_id_2, \
CONFIG_k_2) \
__ALTERNATIVE_CFG_2 old_c, new_c_1, vendor_id_1, errata_id_1, \
IS_ENABLED(CONFIG_k_1), \
new_c_2, vendor_id_2, errata_id_2, \
IS_ENABLED(CONFIG_k_2)
#else /* !__ASSEMBLY__ */
#include <asm/asm.h>
@ -74,6 +92,25 @@
#define _ALTERNATIVE_CFG(old_c, new_c, vendor_id, errata_id, CONFIG_k) \
__ALTERNATIVE_CFG(old_c, new_c, vendor_id, errata_id, IS_ENABLED(CONFIG_k))
#define __ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1, \
enable_1, \
new_c_2, vendor_id_2, errata_id_2, \
enable_2) \
"886 :\n" \
old_c "\n" \
"887 :\n" \
ALT_NEW_CONTENT(vendor_id_1, errata_id_1, enable_1, new_c_1) \
ALT_NEW_CONTENT(vendor_id_2, errata_id_2, enable_2, new_c_2)
#define _ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1, \
CONFIG_k_1, \
new_c_2, vendor_id_2, errata_id_2, \
CONFIG_k_2) \
__ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1, \
IS_ENABLED(CONFIG_k_1), \
new_c_2, vendor_id_2, errata_id_2, \
IS_ENABLED(CONFIG_k_2))
#endif /* __ASSEMBLY__ */
#else /* CONFIG_RISCV_ALTERNATIVE */
@ -86,6 +123,12 @@
#define _ALTERNATIVE_CFG(old_c, new_c, vendor_id, errata_id, CONFIG_k) \
__ALTERNATIVE_CFG old_c
#define _ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1, \
CONFIG_k_1, \
new_c_2, vendor_id_2, errata_id_2, \
CONFIG_k_2) \
__ALTERNATIVE_CFG old_c
#else /* !__ASSEMBLY__ */
#define __ALTERNATIVE_CFG(old_c) \
@ -94,6 +137,12 @@
#define _ALTERNATIVE_CFG(old_c, new_c, vendor_id, errata_id, CONFIG_k) \
__ALTERNATIVE_CFG(old_c)
#define _ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1, \
CONFIG_k_1, \
new_c_2, vendor_id_2, errata_id_2, \
CONFIG_k_2) \
__ALTERNATIVE_CFG(old_c)
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_RISCV_ALTERNATIVE */
@ -119,25 +168,14 @@
* this case, this vendor can create a new macro ALTERNATIVE_2() based
* on the following sample code and then replace ALTERNATIVE() with
* ALTERNATIVE_2() to append its customized content.
*
* .macro __ALTERNATIVE_CFG_2 old_c, new_c_1, vendor_id_1, errata_id_1, enable_1, \
* new_c_2, vendor_id_2, errata_id_2, enable_2
* 886 :
* \old_c
* 887 :
* ALT_NEW_CONTENT \vendor_id_1, \errata_id_1, \enable_1, \new_c_1
* ALT_NEW_CONTENT \vendor_id_2, \errata_id_2, \enable_2, \new_c_2
* .endm
*
* #define _ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, errata_id_1, CONFIG_k_1, \
* new_c_2, vendor_id_2, errata_id_2, CONFIG_k_2) \
* __ALTERNATIVE_CFG_2 old_c, new_c_1, vendor_id_1, errata_id_1, IS_ENABLED(CONFIG_k_1), \
* new_c_2, vendor_id_2, errata_id_2, IS_ENABLED(CONFIG_k_2) \
*
* #define ALTERNATIVE_2(old_content, new_content_1, vendor_id_1, errata_id_1, CONFIG_k_1, \
* new_content_2, vendor_id_2, errata_id_2, CONFIG_k_2) \
* _ALTERNATIVE_CFG_2(old_content, new_content_1, vendor_id_1, errata_id_1, CONFIG_k_1, \
* new_content_2, vendor_id_2, errata_id_2, CONFIG_k_2)
*
*/
#define ALTERNATIVE_2(old_content, new_content_1, vendor_id_1, \
errata_id_1, CONFIG_k_1, \
new_content_2, vendor_id_2, \
errata_id_2, CONFIG_k_2) \
_ALTERNATIVE_CFG_2(old_content, new_content_1, vendor_id_1, \
errata_id_1, CONFIG_k_1, \
new_content_2, vendor_id_2, \
errata_id_2, CONFIG_k_2)
#endif