Blackfin: MPU: support XIP in async flash memory
Barry Song [Wed, 2 Dec 2009 02:50:43 +0000 (02:50 +0000)]
The NOMPU code already supported executing in the async banks, so this
brings the MPU code in line.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/kernel/cplb-mpu/cplbmgr.c

index 69e0e53..930c01c 100644 (file)
@@ -113,11 +113,11 @@ static noinline int dcplb_miss(unsigned int cpu)
                addr = L2_START;
                d_data = L2_DMEMORY;
        } else if (addr >= physical_mem_end) {
-               if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE
-                   && (status & FAULT_USERSUPV)) {
-                       addr &= ~0x3fffff;
+               if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE) {
+                       addr &= ~(4 * 1024 * 1024 - 1);
                        d_data &= ~PAGE_SIZE_4KB;
                        d_data |= PAGE_SIZE_4MB;
+                       d_data |= CPLB_USER_RD | CPLB_USER_WR;
                } else if (addr >= BOOT_ROM_START && addr < BOOT_ROM_START + BOOT_ROM_LENGTH
                    && (status & (FAULT_RW | FAULT_USERSUPV)) == FAULT_USERSUPV) {
                        addr &= ~(1 * 1024 * 1024 - 1);
@@ -203,7 +203,12 @@ static noinline int icplb_miss(unsigned int cpu)
                addr = L2_START;
                i_data = L2_IMEMORY;
        } else if (addr >= physical_mem_end) {
-               if (addr >= BOOT_ROM_START && addr < BOOT_ROM_START + BOOT_ROM_LENGTH
+               if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE) {
+                       addr &= ~(4 * 1024 * 1024 - 1);
+                       i_data &= ~PAGE_SIZE_4KB;
+                       i_data |= PAGE_SIZE_4MB;
+                       i_data |= CPLB_USER_RD;
+               } else if (addr >= BOOT_ROM_START && addr < BOOT_ROM_START + BOOT_ROM_LENGTH
                    && (status & FAULT_USERSUPV)) {
                        addr &= ~(1 * 1024 * 1024 - 1);
                        i_data &= ~PAGE_SIZE_4KB;