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clint and clic base address relocation support #310

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clint and clic base address relocation support #310

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12 changes: 10 additions & 2 deletions src/scrub.S
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,14 @@
* Scrub memory with zero
*/

#include "metal/machine/platform.h"

#ifdef METAL_RISCV_CLINT0
.equ MSIP_CTRL_ADDR, METAL_RISCV_CLINT0_0_BASE_ADDRESS
#else /* METAL_SIFIVE_CLIC0 */
.equ MSIP_CTRL_ADDR, METAL_SIFIVE_CLIC0_0_BASE_ADDRESS
#endif

/* Keep it in metal.init section with _enter */
.section .text.metal.init.scrub
/* Disable linker relaxation */
Expand Down Expand Up @@ -107,14 +115,14 @@ memory_scrub:
jal _metal_memory_scrub

done_scrub:
lui a4, 0x2000
li a4, MSIP_CTRL_ADDR
li a5,1
sw a5,0(a4)
fence w,rw
j skip_scrub

wait_scrub:
lui a4, 0x2000
li a4, MSIP_CTRL_ADDR
lw a5, 0(a4)
beqz a5, wait_scrub

Expand Down