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2015-01-13MIPS: mips-cm: Fix sparse warningsJames Hogan1-2/+2
Sparse emits a bunch of warnings in mips-cm.h due to casting away of __iomem by the addr_gcr_*() functions: arch/mips/include/asm/mips-cm.h:134:1: warning: cast removes address space of expression And subsequent passing of the return values to __raw_readl() and __raw_writel() in the read_gcr_*() and write_gcr_*() functions: arch/mips/include/asm/mips-cm.h:134:1: warning: incorrect type in argument 2 (different address spaces) arch/mips/include/asm/mips-cm.h:134:1: expected void volatile [noderef] <asn:2>*mem arch/mips/include/asm/mips-cm.h:134:1: got unsigned int [usertype] * arch/mips/include/asm/mips-cm.h:134:1: warning: incorrect type in argument 1 (different address spaces) arch/mips/include/asm/mips-cm.h:134:1: expected void const volatile [noderef] <asn:2>*mem arch/mips/include/asm/mips-cm.h:134:1: got unsigned int [usertype] * Fix by adding __iomem to the addr_gcr_*() return type and cast. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8874/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-25MIPS: Replace use of phys_t with phys_addr_t.Ralf Baechle1-1/+1
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-03-31MIPS: CM: use __raw_ memory access functionsPaul Burton1-2/+2
The CM registers use native endianness, so using plain readl & writel will produce incorrect results on big endian systems. Reported-by: Jeffrey Deans <jeffrey.deans@imgtec.com> Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6656/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-03-07MIPS: Add generic CM probe & access codePaul Burton1-0/+322
The kernel currently only probes for a MIPS Coherence Manager in the Malta interrupt code in order to detect & enable the GIC. However CM is not Malta-specific, so this should really be more generic. This patch introduces some non-Malta-specific code which probes for a CM and performs some basic initialisation. A new header, with temporarily duplicated register definitions, is introduced in order to: 1) Allow the new definitions to be correct with regards to the CM documentation, as many of those in gcmpregs.h aren't. 2) Allow switching away from the REG() macro used via a few layers of nested macros in order to access registers in gcmpregs.h. This patch instead introduced accessor functions akin to the {read,write}_c0_* functions used for cop0 registers. 3) Allow users of the CM to be migrated one by one. 4) Switch from the name 'GCMP' to 'CM' since the Coherence Manager is what this code is actually dealing with. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6360/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>