diff options
Diffstat (limited to 'sys/powerpc/mpc85xx/mpc85xx.c')
| -rw-r--r-- | sys/powerpc/mpc85xx/mpc85xx.c | 69 |
1 files changed, 66 insertions, 3 deletions
diff --git a/sys/powerpc/mpc85xx/mpc85xx.c b/sys/powerpc/mpc85xx/mpc85xx.c index b75e301..de9c771 100644 --- a/sys/powerpc/mpc85xx/mpc85xx.c +++ b/sys/powerpc/mpc85xx/mpc85xx.c @@ -10,9 +10,6 @@ * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the author nor the names of contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE @@ -64,6 +61,72 @@ ccsr_write4(uintptr_t addr, uint32_t val) __asm __volatile("eieio; sync"); } +static __inline int +law_getmax(void) +{ + uint32_t ver; + + ver = SVR_VER(mfspr(SPR_SVR)); + if (ver == SVR_MPC8572E || ver == SVR_MPC8572) + return (12); + else + return (8); +} + +#define _LAW_SR(trgt,size) (0x80000000 | (trgt << 20) | (ffsl(size) - 2)) +#define _LAW_BAR(addr) (addr >> 12) + +int +law_enable(int trgt, u_long addr, u_long size) +{ + uint32_t bar, sr; + int i, law_max; + + law_max = law_getmax(); + bar = _LAW_BAR(addr); + sr = _LAW_SR(trgt, size); + + /* Bail if already programmed. */ + for (i = 0; i < law_max; i++) + if (sr == ccsr_read4(OCP85XX_LAWSR(i)) && + bar == ccsr_read4(OCP85XX_LAWBAR(i))) + return (0); + + /* Find an unused access window. */ + for (i = 0; i < law_max; i++) + if ((ccsr_read4(OCP85XX_LAWSR(i)) & 0x80000000) == 0) + break; + + if (i == law_max) + return (ENOSPC); + + ccsr_write4(OCP85XX_LAWBAR(i), bar); + ccsr_write4(OCP85XX_LAWSR(i), sr); + return (0); +} + +int +law_disable(int trgt, u_long addr, u_long size) +{ + uint32_t bar, sr; + int i, law_max; + + law_max = law_getmax(); + bar = _LAW_BAR(addr); + sr = _LAW_SR(trgt, size); + + /* Find and disable requested LAW. */ + for (i = 0; i < law_max; i++) + if (sr == ccsr_read4(OCP85XX_LAWSR(i)) && + bar == ccsr_read4(OCP85XX_LAWBAR(i))) { + ccsr_write4(OCP85XX_LAWBAR(i), 0); + ccsr_write4(OCP85XX_LAWSR(i), 0); + return (0); + } + + return (ENOENT); +} + void cpu_reset(void) { |
