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Diffstat (limited to 'c/src/lib/libcpu/powerpc/mpc55xx/misc/flash_support.c')
| -rw-r--r-- | c/src/lib/libcpu/powerpc/mpc55xx/misc/flash_support.c | 698 |
1 files changed, 0 insertions, 698 deletions
diff --git a/c/src/lib/libcpu/powerpc/mpc55xx/misc/flash_support.c b/c/src/lib/libcpu/powerpc/mpc55xx/misc/flash_support.c deleted file mode 100644 index 1d94fda205..0000000000 --- a/c/src/lib/libcpu/powerpc/mpc55xx/misc/flash_support.c +++ /dev/null @@ -1,698 +0,0 @@ -/** - * @file - * - * @ingroup mpc55xx - * - * @brief MPC55XX flash memory support. - * - * I set my MMU up to map what will finally be in flash into RAM and at the - * same time I map the flash to a different location. When the software - * is tested I can use this to copy the RAM version of the program into - * the flash and when I reboot I'm running out of flash. - * - * I use a flag word located after the boot configuration half-word to - * indicate that the MMU should be left alone, and I don't include the RCHW - * or that flag in my call to this routine. - * - * There are obviously other uses for this. - **/ - -/* - * Copyright (c) 2009-2011 - * HD Associates, Inc. - * 18 Main Street - * Pepperell, MA 01463 - * USA - * dufault@hda.com - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <errno.h> -#include <sys/types.h> -#include <mpc55xx/regs.h> -#include <mpc55xx/mpc55xx.h> - -#include <libcpu/powerpc-utility.h> -#include <rtems/powerpc/registers.h> - -#if MPC55XX_CHIP_FAMILY == 555 || MPC55XX_CHIP_FAMILY == 556 - -/* Set up the memory ranges for the flash on - * the MPC5553, MPC5554, MPC5566 and MPC5567. - * I check if it is an unknown CPU and return an error. - * - * These CPUS have a low, mid, and high space of memory. - * - * Only the low space really needs a table like this, but for simplicity - * I do low, mid, and high the same way. - */ -struct range { /* A memory range. */ - uint32_t lower; - uint32_t upper; -}; - -/* The ranges of the memory banks for the low space. All the - * chips I'm looking at share this low format, identified by LAS=6: - * 2 16K banks, - * 2 48K banks, - * 2 64K banks. - */ -static const struct range lsel_ranges[] = { - { 0, (1*16 )*1024 - 1}, - {(1*16 )*1024, (2*16 )*1024 - 1}, - {(2*16 )*1024, (2*16 + 1*48 )*1024 - 1}, - {(2*16 + 1*48 )*1024, (2*16 + 2*48 )*1024 - 1}, - {(2*16 + 2*48 )*1024, (2*16 + 2*48 + 1*64)*1024 - 1}, - {(2*16 + 2*48 + 1*64)*1024, (2*16 + 2*48 + 2*64)*1024 - 1}, -}; - -/* The ranges of the memory blocks for the mid banks, 2 128K banks. - * Again, all the chips share this, identified by MAS=0. - */ -#define MBSTART ((2*16+2*48+2*64)*1024) -static const struct range msel_ranges[] = { - {MBSTART , MBSTART + 1*128*1024 - 1}, - {MBSTART + 1*128*1024, MBSTART + 2*128*1024 - 1}, -}; - -/* The ranges of the memory blocks for the high banks. - * There are N 128K banks, where N <= 20, - * and is identified by looking at the SIZE field. - * - * This could benefit from being redone to save a few bytes - * and provide for bigger flash spaces. - */ -#define HBSTART (MBSTART+2*128*1024) -static const struct range hbsel_ranges[] = { - {HBSTART , HBSTART + 1*128*1024 - 1}, - {HBSTART + 1*128*1024, HBSTART + 2*128*1024 - 1}, - {HBSTART + 2*128*1024, HBSTART + 3*128*1024 - 1}, - {HBSTART + 3*128*1024, HBSTART + 4*128*1024 - 1}, - {HBSTART + 4*128*1024, HBSTART + 5*128*1024 - 1}, - {HBSTART + 5*128*1024, HBSTART + 6*128*1024 - 1}, - {HBSTART + 6*128*1024, HBSTART + 7*128*1024 - 1}, - {HBSTART + 7*128*1024, HBSTART + 8*128*1024 - 1}, - {HBSTART + 8*128*1024, HBSTART + 9*128*1024 - 1}, - {HBSTART + 9*128*1024, HBSTART + 10*128*1024 - 1}, - {HBSTART + 10*128*1024, HBSTART + 11*128*1024 - 1}, - {HBSTART + 11*128*1024, HBSTART + 12*128*1024 - 1}, - {HBSTART + 12*128*1024, HBSTART + 13*128*1024 - 1}, - {HBSTART + 13*128*1024, HBSTART + 14*128*1024 - 1}, - {HBSTART + 14*128*1024, HBSTART + 15*128*1024 - 1}, - {HBSTART + 15*128*1024, HBSTART + 16*128*1024 - 1}, - {HBSTART + 16*128*1024, HBSTART + 17*128*1024 - 1}, - {HBSTART + 17*128*1024, HBSTART + 18*128*1024 - 1}, - {HBSTART + 18*128*1024, HBSTART + 19*128*1024 - 1}, - {HBSTART + 19*128*1024, HBSTART + 20*128*1024 - 1}, -}; - -/* Set bits in a bitmask to indicate which banks are - * within the range "first" and "last". - */ -static void -range_set( - uint32_t first, - uint32_t last, - int *p_bits, - const struct range *pr, - int n_range -) -{ - int i; - int bits = 0; - for (i = 0; i < n_range; i++) { - /* If the upper limit is less than "first" or the lower limit - * is greater than "last" then the block is not in range. - */ - if ( !(pr[i].upper < first || pr[i].lower > last)) { - bits |= (1 << i); /* This block is in the range, set the bit. */ - } - - } - *p_bits = bits; -} - -/** Return the size of the on-chip flash - * verifying that this is a device that we know about. - * @return 0 for OK, non-zero for error: - * - MPC55XX_FLASH_VERIFY_ERR for LAS not 6 or MAS not 0. - * @note This is overriding what verify means! - * - MPC55XX_FLASH_SIZE_ERR Not a chip I've checked against the manual, - * athat is, SIZE not 5, 7, or 11. - */ -int -mpc55xx_flash_size( - uint32_t *p_size /**< The size is returned here. */ -) -{ - /* On the MPC5553, MPC5554, MPC5566, and MP5567 the - * low address space LAS field is 0x6 and all have - * six blocks sized 2*16k, 2*48k, and 2*64k. - * - * All the mid and high address spaces have 128K blocks. - * - * The mid address space MAS size field is 0 for the above machines, - * and they all have 2 128K blocks. - * - * For the high address space we look at the - * size field to figure out the size. The SIZE field is: - * - * 5 for 1.5MB (MPC5553) - * 7 for 2MB (MPC5554, MPC5567) - * 11 for 3MB (MPC5566) - */ - int hblocks; /* The number of blocks in the high address space. */ - - /* Verify the configuration matches one of the chips that I've checked out. - */ - if (FLASH.MCR.B.LAS != 6 || FLASH.MCR.B.MAS != 0) { - return MPC55XX_FLASH_VERIFY_ERR; - } - - switch(FLASH.MCR.B.SIZE) { - case 5: - hblocks = 8; - break; - - case 7: - hblocks = 12; - break; - - case 11: - hblocks = 20; - break; - - default: - return MPC55XX_FLASH_SIZE_ERR; - } - - /* The first two banks are 256K. - * The high block has "hblocks" 128K blocks. - */ - *p_size = 256*1024 + 256*1024 + hblocks * 128*1024; - return 0; -} - -/* Unlock the flash blocks if "p_locked" points to something that is 0. - * If it is a NULL pointer then we aren't allowed to do the unlock. - */ -static int -unlock_once(int lsel, int msel, int hbsel, int *p_locked) -{ - union LMLR_tag lmlr; - union SLMLR_tag slmlr; - union HLR_tag hlr; - - /* If we're already locked return. - */ - if (p_locked && (*p_locked == 1)) { - return 0; - } - - /* Do we have to lock something in the low or mid block? - */ - lmlr = FLASH.LMLR; - if ((lsel || msel) && (lmlr.B.LME == 0)) { - union LMLR_tag lmlr_unlock; - lmlr_unlock.B.LLOCK=~lsel; - lmlr_unlock.B.MLOCK=~msel; - lmlr_unlock.B.SLOCK=1; - - if (lmlr.B.LLOCK != lmlr_unlock.B.LLOCK || - lmlr.B.MLOCK != lmlr_unlock.B.MLOCK) { - if (p_locked == 0) { - return MPC55XX_FLASH_LOCK_ERR; - } else { - *p_locked = 1; - } - FLASH.LMLR.R = 0xA1A11111; /* Unlock. */ - FLASH.LMLR = lmlr_unlock; - } - } - - slmlr = FLASH.SLMLR; - if ((lsel || msel) && (slmlr.B.SLE == 0)) { - union SLMLR_tag slmlr_unlock; - slmlr_unlock.B.SLLOCK=~lsel; - slmlr_unlock.B.SMLOCK=~msel; - slmlr_unlock.B.SSLOCK=1; - - if (slmlr.B.SLLOCK != slmlr_unlock.B.SLLOCK || - slmlr.B.SMLOCK != slmlr_unlock.B.SMLOCK) { - if (p_locked == 0) { - return MPC55XX_FLASH_LOCK_ERR; - } else { - *p_locked = 1; - } - FLASH.SLMLR.R = 0xC3C33333; /* Unlock. */ - FLASH.SLMLR = slmlr_unlock; - } - } - - /* Do we have to unlock something in the high block? - */ - hlr = FLASH.HLR; - if (hbsel && (hlr.B.HBE == 0)) { - union HLR_tag hlr_unlock; - hlr_unlock.B.HBLOCK = ~hbsel; - - if (hlr.B.HBLOCK != hlr_unlock.B.HBLOCK) { - if (p_locked == 0) { - return MPC55XX_FLASH_LOCK_ERR; - } else { - *p_locked = 1; - } - FLASH.HLR.R = 0xB2B22222; /* Unlock. */ - FLASH.HLR = hlr_unlock; - } - } - - return 0; -} - -static inline uint32_t -tsize(int i) -{ - return 1 << (10 + 2 * i); -} - -static int -addr_map( - int to_phys, /* If 1 lookup physical else lookup mapped. */ - const void *addr, /* The address to look up. */ - uint32_t *p_result /* Result is here. */ -) -{ - uint32_t u_addr = (uint32_t)addr; - uint32_t mas0, mas1, mas2, mas3; - uint32_t start, end; - rtems_interrupt_level level; - int i; - - for (i = 0; i < 32; i++) { - mas0 = 0x10000000 | (i << 16); - rtems_interrupt_disable(level); - PPC_SET_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS0, mas0); - asm volatile("tlbre"); - mas1 = PPC_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS1); - mas2 = PPC_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS2); - mas3 = PPC_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS3); - rtems_interrupt_enable(level); - - if (mas1 & 0x80000000) { - /* Valid. */ - start = (to_phys ? mas2 : mas3) & 0xFFFFF000; - end = start + tsize((mas1 >> 8) & 0x0000000F); - /* Are we within range? - */ - if (start <= u_addr && end >= u_addr) { - uint32_t offset = (to_phys ? mas3 : mas2) & 0xFFFFF000; - *p_result = u_addr - offset; - return 0; - } - } - } - - /* Not found in a TLB. - */ - return ESRCH; -} - -/** Return the physical address corresponding to a mapped address. - @return 0 if OK, ESRCH if not found in TLB1. - **/ -int -mpc55xx_physical_address( - const void *addr, /**< Mapped address. */ - uint32_t *p_result /**< Result returned here. */ -) -{ - return addr_map(1, addr, p_result); -} - -/** Return the mapped address corresponding to a mapped address. - @return 0 if OK, ESRCH if not found in TLB1. - **/ -int -mpc55xx_mapped_address( - const void *addr, /**< Mapped address. */ - uint32_t *p_result /**< Result returned here. */ -) -{ - return addr_map(0, addr, p_result); -} - -/** - * Copy memory from an address into the flash when flash is relocated - * If programming fails the address that it failed at can be returned. - @note At end of operation the flash may be left writable. - * Use mpc55xx_flash_read_only() to set read-only. - @return Zero for OK, non-zero for error: - * - ESRCH Can't lookup where something lives. - * - EPERM Attempt to write to non-writable flash. - * - ETXTBSY Attempt to flash overlapping regions. - * - MPC55XX_FLASH_CONFIG_ERR for LAS not 6 or MAS not 0. - * - MPC55XX_FLASH_SIZE_ERR for SIZE not 5, 7, or 11. - * - MPC55XX_FLASH_RANGE_ERR for illegal access: - * - first or first+last outside of flash; - * - first not on a mod(8) boundary; - * - nbytes not multiple of 8. - * - MPC55XX_FLASH_ERASE_ERR Erase requested but failed. - * - MPC55XX_FLASH_PROGRAM_ERR Program requested but failed. - * - MPC55XX_FLASH_NOT_BLANK_ERR Blank check requested but not blank. - * - MPC55XX_FLASH_VERIFY_ERR Verify requested but failed. - * - MPC55XX_FLASH_LOCK_ERR Unlock requested but failed. - **/ - -int -mpc55xx_flash_copy_op( - void *dest, /**< An address in the flash to copy to. */ - const void *src, /**< An address in memory to copy from. */ - size_t nbytes, /**< The number of bytes to copy. */ - uint32_t opmask, /**< Bitmask of operations to perform. - * - MPC55XX_FLASH_UNLOCK: Unlock the blocks. - * - MPC55XX_FLASH_ERASE: Erase the blocks. - * - MPC55XX_FLASH_BLANK_CHECK: Verify the blocks are blank. - * - MPC55XX_FLASH_PROGRAM: Program the FLASH. - * - MPC55XX_FLASH_VERIFY: Verify the regions match. - **/ - uint32_t *p_fail /**< If not NULL then the address where the operation - * failed is returned here. - **/ -) -{ - uint32_t udest, usrc, flash_size; - int r; - int peg; /* Program or Erase Good - Did it work? */ - - int lsel; /* Low block select bits. */ - int msel; /* Mid block select bits. */ - int hbsel; /* High block select bits. */ - - int s_lsel; /* Source Low block select bits. */ - int s_msel; /* Source Mid block select bits. */ - int s_hbsel; /* Source High block select bits. */ - - int unlocked = 0; - int *p_unlocked; - int i; - int nwords; /* The number of 32 bit words to write. */ - volatile uint32_t *flash; /* Where the flash is mapped in. */ - volatile uint32_t *memory; /* What to copy into flash. */ - const void *flashing_from; /* Where we are flahsing from. - * "const" is to match invalidate cache function signature. */ - uint32_t offset; /* Where the FLASH is mapped into memory. */ - - if ( (r = mpc55xx_flash_size(&flash_size))) { - return r; - } - - /* Get where the flash is mapped in. - */ - offset = mpc55xx_flash_address(); - - udest = ((uint32_t)dest) - offset; - if ( (r = mpc55xx_physical_address(src, &usrc)) ) { - return r; - } - - /* Verify that the address being programmed is in flash and that it is - * a multiple of 64 bits. - * Someone else can remove the 64-bit restriction. - */ - if (udest > flash_size || - udest + nbytes > flash_size || - (udest & 0x7) != 0 || - (nbytes & 0x7) != 0) { - return MPC55XX_FLASH_RANGE_ERR; - } - - if (opmask == 0) { - return 0; - } - - /* If we're going to do a write-style operation the flash must be writable. - */ - if ((opmask & - (MPC55XX_FLASH_UNLOCK | MPC55XX_FLASH_ERASE | MPC55XX_FLASH_PROGRAM)) && - !mpc55xx_flash_writable() - ) { - return EPERM; - } - - /* If we aren't allowed to unlock then set the pointer to zero. - * That is how "unlock_once" decides we can't unlock. - */ - p_unlocked = (opmask & MPC55XX_FLASH_UNLOCK) ? &unlocked : 0; - - /* Set up the bit masks for the blocks to program or erase. - */ - range_set(udest, udest + nbytes, &lsel, lsel_ranges, RTEMS_ARRAY_SIZE( lsel_ranges)); - range_set(udest, udest + nbytes, &msel, msel_ranges, RTEMS_ARRAY_SIZE( msel_ranges)); - range_set(udest, udest + nbytes, &hbsel, hbsel_ranges, RTEMS_ARRAY_SIZE(hbsel_ranges)); - - range_set(usrc, usrc + nbytes, &s_lsel, lsel_ranges, RTEMS_ARRAY_SIZE( lsel_ranges)); - range_set(usrc, usrc + nbytes, &s_msel, msel_ranges, RTEMS_ARRAY_SIZE( msel_ranges)); - range_set(usrc, usrc + nbytes, &s_hbsel, hbsel_ranges, RTEMS_ARRAY_SIZE(hbsel_ranges)); - - /* Are we attempting overlapping flash? - */ - if ((lsel & s_lsel) | (msel & s_msel) | (hbsel & s_hbsel)) { - return ETXTBSY; - } - - nwords = nbytes / 4; - flash = (volatile uint32_t *)dest; - memory = (volatile uint32_t *)src; - - /* In the following sections any "Step N" notes refer to - * the steps in "13.4.2.3 Flash Programming" in the reference manual. - */ - - if (opmask & MPC55XX_FLASH_ERASE) { /* Erase. */ - uint32_t flash_biucr_r; - if ( (r = unlock_once(lsel, msel, hbsel, p_unlocked)) ) { - return r; - } - - /* Per errata "e989: FLASH: Disable Prefetch during programming and erase" */ - flash_biucr_r = FLASH.BIUCR.R; - FLASH.BIUCR.B.PFLIM = 0; - - FLASH.MCR.B.ESUS = 0; /* Be sure ESUS is clear. */ - - FLASH.MCR.B.ERS = 1; /* Step 1: Select erase. */ - - FLASH.LMSR.B.LSEL = lsel; /* Step 2: Select blocks to be erased. */ - FLASH.LMSR.B.MSEL = msel; - FLASH.HSR.B.HBSEL = hbsel; - - flash[0] = 0xffffffff; /* Step 3: Write to any address in the flash - * (the "erase interlock write)". - */ - rtems_cache_flush_multiple_data_lines( - RTEMS_DEVOLATILE(void *,flash), - sizeof(flash[0]) - ); - - FLASH.MCR.B.EHV = 1; /* Step 4: Enable high V to start erase. */ - while (FLASH.MCR.B.DONE == 0) { /* Step 5: Wait until done. */ - } - peg = FLASH.MCR.B.PEG; /* Save result. */ - FLASH.MCR.B.EHV = 0; /* Disable high voltage. */ - FLASH.MCR.B.ERS = 0; /* De-select erase. */ - FLASH.BIUCR.R = flash_biucr_r; - - if (peg == 0) { - return MPC55XX_FLASH_ERASE_ERR; /* Flash erase failed. */ - } - } - - if (opmask & MPC55XX_FLASH_BLANK_CHECK) { /* Verify blank. */ - for (i = 0; i < nwords; i++) { - if (flash[i] != 0xffffffff) { - if (p_fail) { - *p_fail = (uint32_t)(flash + i); - } - return MPC55XX_FLASH_NOT_BLANK_ERR; /* Not blank. */ - } - } - } - - /* Program. - */ - if (opmask & MPC55XX_FLASH_PROGRAM) { - int chunk = 0; /* Used to collect programming into 256 bit chunks. */ - - if ( (r = unlock_once(lsel, msel, hbsel, p_unlocked)) ) { - return r; - } - FLASH.MCR.B.PGM = 1; /* Step 1 */ - - for (flashing_from = (const void *)flash, i = 0; i < nwords; i += 2) { - flash[i] = memory[i]; /* Step 2 */ - flash[i + 1] = memory[i + 1]; /* Always program in min 64 bits. */ - - /* Step 3 is "write additional words" */ - - /* Try to program in chunks of 256 bits. - * Collect the 64 bit writes into 256 bit ones: - */ - chunk++; - if (chunk == 4) { - /* Collected 4 64-bits for a 256 bit chunk. */ - - rtems_cache_flush_multiple_data_lines(flashing_from, 32); /* Flush cache. */ - - FLASH.MCR.B.EHV = 1; /* Step 4: Enable high V. */ - - while (FLASH.MCR.B.DONE == 0) { /* Step 5: Wait until done. */ - } - - peg = FLASH.MCR.B.PEG; /* Step 6: Save result. */ - FLASH.MCR.B.EHV = 0; /* Step 7: Disable high V. */ - if (peg == 0) { - FLASH.MCR.B.PGM = 0; - if (p_fail) { - *p_fail = (uint32_t)(flash + i); - } - return MPC55XX_FLASH_PROGRAM_ERR; /* Programming failed. */ - } - chunk = 0; /* Reset chunk counter. */ - flashing_from = (const void *)(flash + i); - } - /* Step 8: Back to step 2. */ - } - - if (!chunk) { - FLASH.MCR.B.PGM = 0; - } else { - /* If there is anything left in that last chunk flush it out: - */ - - rtems_cache_flush_multiple_data_lines(flashing_from, chunk * 8); - - FLASH.MCR.B.EHV = 1; - - while (FLASH.MCR.B.DONE == 0) { /* Wait until done. */ - } - - peg = FLASH.MCR.B.PEG; /* Save result. */ - FLASH.MCR.B.EHV = 0; /* Disable high voltage. */ - FLASH.MCR.B.PGM = 0; - - if (peg == 0) { - if (p_fail) { - *p_fail = (uint32_t)(flash + i); - } - return MPC55XX_FLASH_PROGRAM_ERR; /* Programming failed. */ - } - } - } - - if (opmask & MPC55XX_FLASH_VERIFY) { /* Verify memory matches. */ - for (i = 0; i < nwords; i++) { - if (flash[i] != memory[i]) { - if (p_fail) { /* Return the failed address. */ - *p_fail = (uint32_t)(flash + i); - } - return MPC55XX_FLASH_VERIFY_ERR; /* Verification failed. */ - } - } - } - - return 0; -} - -/** Simple flash copy with a signature that matches memcpy. - @note At end of operation the flash may be left writable. - * Use mpc55xx_flash_read_only() to set read-only. - @return Zero for OK, non-zero for error. - * see flash_copy_op() for possible errors. - **/ -int -mpc55xx_flash_copy( - void *dest, /**< An address in the flash to copy to. */ - const void *src, /**< An address in the flash copy from. */ - size_t nbytes /**< The number of bytes to copy. */ -) -{ - return mpc55xx_flash_copy_op(dest, src, nbytes, - (MPC55XX_FLASH_UNLOCK | - MPC55XX_FLASH_ERASE | - MPC55XX_FLASH_BLANK_CHECK | - MPC55XX_FLASH_PROGRAM | - MPC55XX_FLASH_VERIFY ), 0); -} - -/** Make the flash read-write. - @note This assumes the flash is mapped by TLB1 entry 1. - */ -void -mpc55xx_flash_set_read_write(void) -{ - rtems_interrupt_level level; - rtems_interrupt_disable(level); - PPC_SET_SPECIAL_PURPOSE_REGISTER( FSL_EIS_MAS0, 0x10010000); - asm volatile("tlbre"); - PPC_SET_SPECIAL_PURPOSE_REGISTER_BITS(FSL_EIS_MAS3, 0x0000000C); - asm volatile("tlbwe"); - rtems_interrupt_enable(level); -} - -/** Make the flash read-only. - @note This assumes the flash is mapped by TLB1 entry 1. - */ -void -mpc55xx_flash_set_read_only(void) -{ - rtems_interrupt_level level; - rtems_interrupt_disable(level); - PPC_SET_SPECIAL_PURPOSE_REGISTER( FSL_EIS_MAS0, 0x10010000); - asm volatile("tlbre"); - PPC_CLEAR_SPECIAL_PURPOSE_REGISTER_BITS(FSL_EIS_MAS3, 0x0000000C); - asm volatile("tlbwe"); - rtems_interrupt_enable(level); -} - -/** See if the flash is writable. - * @note This assumes the flash is mapped by TLB1 entry 1. - * @note It needs to be writable by both user and supervisor. - */ -int -mpc55xx_flash_writable(void) -{ - uint32_t mas3; - rtems_interrupt_level level; - - rtems_interrupt_disable(level); - PPC_SET_SPECIAL_PURPOSE_REGISTER( FSL_EIS_MAS0, 0x10010000); - asm volatile("tlbre"); - mas3 = PPC_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS3); - rtems_interrupt_enable(level); - - return ((mas3 & 0x0000000C) == 0x0000000C) ? 1 : 0; -} - -/** Return the address where the flash is mapped in. - @note This assumes the flash is mapped by TLB1 entry 1. - **/ -uint32_t -mpc55xx_flash_address(void) -{ - uint32_t mas2; - rtems_interrupt_level level; - - rtems_interrupt_disable(level); - PPC_SET_SPECIAL_PURPOSE_REGISTER( FSL_EIS_MAS0, 0x10010000); - asm volatile("tlbre"); - mas2 = PPC_SPECIAL_PURPOSE_REGISTER(FSL_EIS_MAS2); - rtems_interrupt_enable(level); - - return mas2 & 0xFFFFF000; -} - -#endif /* MPC55XX_CHIP_FAMILY == 555 || MPC55XX_CHIP_FAMILY == 556 */ |