Huacai Chen
81f5d15c48
LoongArch: Add adaptive CSR accessors for 32BIT/64BIT ...
32BIT platforms only have 32bit CSR/IOCSR registers, 64BIT platforms
have both 32bit/64bit CSR/IOCSR registers. Now there are both 32bit and
64bit CSR accessors:
csr_read32()/csr_write32()/csr_xchg32();
csr_read64()/csr_write64()/csr_xchg64();
Some CSR registers (address and timer registers) are 32bit length on
32BIT platform and 64bit length on 64BIT platform. To avoid #ifdefs here
and there, they need adaptive accessors, so we define and use:
csr_read()/csr_write()/csr_xchg();
IOCSR doesn't have a "natural length", which means a 64bit register can
be treated as two 32bit registers, so we just use two 32bit accessors to
emulate a 64bit accessors.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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81f5d15c48