85xx: Move LAW init code into C

Move the initialization of the LAWs into C code and provide an API
to allow modification of LAWs after init.

Board code is responsible to provide a law_table and num_law_entries.

We should be able to use the same code on 86xx as well.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/include/asm-ppc/fsl_law.h b/include/asm-ppc/fsl_law.h
new file mode 100644
index 0000000..7cb8840
--- /dev/null
+++ b/include/asm-ppc/fsl_law.h
@@ -0,0 +1,80 @@
+#ifndef _FSL_LAW_H_
+#define _FSL_LAW_H_
+
+#include <asm/io.h>
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#define SET_LAW_ENTRY(idx, a, sz, trgt) \
+	{ .index = idx, .addr = a, .size = sz, .trgt_id = trgt }
+
+enum law_size {
+	LAW_SIZE_4K = 0xb,
+	LAW_SIZE_8K,
+	LAW_SIZE_16K,
+	LAW_SIZE_32K,
+	LAW_SIZE_64K,
+	LAW_SIZE_128K,
+	LAW_SIZE_256K,
+	LAW_SIZE_512K,
+	LAW_SIZE_1M,
+	LAW_SIZE_2M,
+	LAW_SIZE_4M,
+	LAW_SIZE_8M,
+	LAW_SIZE_16M,
+	LAW_SIZE_32M,
+	LAW_SIZE_64M,
+	LAW_SIZE_128M,
+	LAW_SIZE_256M,
+	LAW_SIZE_512M,
+	LAW_SIZE_1G,
+	LAW_SIZE_2G,
+	LAW_SIZE_4G,
+	LAW_SIZE_8G,
+	LAW_SIZE_16G,
+	LAW_SIZE_32G,
+};
+
+enum law_trgt_if {
+	LAW_TRGT_IF_PCI = 0x00,
+	LAW_TRGT_IF_PCI_2 = 0x01,
+#ifndef CONFIG_MPC8641
+	LAW_TRGT_IF_PCIE_1 = 0x02,
+#endif
+#ifndef CONFIG_MPC8572
+	LAW_TRGT_IF_PCIE_3 = 0x03,
+#endif
+	LAW_TRGT_IF_LBC = 0x04,
+	LAW_TRGT_IF_CCSR = 0x08,
+	LAW_TRGT_IF_DDR_INTRLV = 0x0b,
+	LAW_TRGT_IF_RIO = 0x0c,
+	LAW_TRGT_IF_DDR = 0x0f,
+	LAW_TRGT_IF_DDR_2 = 0x16,	/* 2nd controller */
+};
+#define LAW_TRGT_IF_DDR_1	LAW_TRGT_IF_DDR
+#define LAW_TRGT_IF_PCI_1	LAW_TRGT_IF_PCI
+#define LAW_TRGT_IF_PCIX	LAW_TRGT_IF_PCI
+#define LAW_TRGT_IF_PCIE_2	LAW_TRGT_IF_PCI_2
+
+#ifdef CONFIG_MPC8641
+#define LAW_TRGT_IF_PCIE_1	LAW_TRGT_IF_PCI
+#endif
+
+#ifdef CONFIG_MPC8572
+#define LAW_TRGT_IF_PCIE_3	LAW_TRGT_IF_PCI
+#endif
+
+struct law_entry {
+	int index;
+	phys_addr_t addr;
+	enum law_size size;
+	enum law_trgt_if trgt_id;
+};
+
+extern void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id);
+extern void disable_law(u8 idx);
+extern void init_laws(void);
+
+/* define in board code */
+extern struct law_entry law_table[];
+extern int num_law_entries;
+#endif