[PATCH v2] cache: StarFive: Require a 64-bit system

[Palmer Dabbelt]

From: Palmer Dabbelt <palmer at rivosinc.com>

This has a bunch of {read,write}q() calls, so it won't work on 32-bit
systems.  I don't think there's any 32-bit StarFive systems, so for now
just require 64-bit.

Fixes: cabff60ca77d ("cache: Add StarFive StarLink cache management")
Acked-by: Conor Dooley <conor.dooley at microchip.com>
Signed-off-by: Palmer Dabbelt <palmer at rivosinc.com>
---
Changes since v1 <20240719163841.19018-1-palmer at rivosinc.com>:

* Drop the STARLINK_CACHE_ADDRESS_RANGE_MASK chunk, it's meaningless
  without 32-bit support (as Emil pointed out on IRC).
---
 drivers/cache/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cache/Kconfig b/drivers/cache/Kconfig
index 94abd8f632a7..db51386c663a 100644
--- a/drivers/cache/Kconfig
+++ b/drivers/cache/Kconfig
@@ -18,6 +18,7 @@ config STARFIVE_STARLINK_CACHE
 	bool "StarFive StarLink Cache controller"
 	depends on RISCV
 	depends on ARCH_STARFIVE
+	depends on 64BIT
 	select RISCV_DMA_NONCOHERENT
 	select RISCV_NONSTANDARD_CACHE_OPS
 	help
-- 
2.45.2