diff options
Diffstat (limited to 'arch/powerpc/lib/bat_rw.c')
-rw-r--r-- | arch/powerpc/lib/bat_rw.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/arch/powerpc/lib/bat_rw.c b/arch/powerpc/lib/bat_rw.c new file mode 100644 index 0000000000..bffa504aea --- /dev/null +++ b/arch/powerpc/lib/bat_rw.c @@ -0,0 +1,126 @@ +/* + * (C) Copyright 2002 + * Rich Ireland, Enterasys Networks, rireland@enterasys.com. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * + */ + +#include <common.h> +#include <asm/processor.h> +#include <asm/mmu.h> + +int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower) +{ + switch (bat) { + case IBAT0: + mtspr (IBAT0L, lower); + mtspr (IBAT0U, upper); + break; + + case IBAT1: + mtspr (IBAT1L, lower); + mtspr (IBAT1U, upper); + break; + + case IBAT2: + mtspr (IBAT2L, lower); + mtspr (IBAT2U, upper); + break; + + case IBAT3: + mtspr (IBAT3L, lower); + mtspr (IBAT3U, upper); + break; + + case DBAT0: + mtspr (DBAT0L, lower); + mtspr (DBAT0U, upper); + break; + + case DBAT1: + mtspr (DBAT1L, lower); + mtspr (DBAT1U, upper); + break; + + case DBAT2: + mtspr (DBAT2L, lower); + mtspr (DBAT2U, upper); + break; + + case DBAT3: + mtspr (DBAT3L, lower); + mtspr (DBAT3U, upper); + break; + + default: + return (-1); + } + + return (0); +} + +int read_bat (ppc_bat_t bat, unsigned long *upper, unsigned long *lower) +{ + unsigned long register u; + unsigned long register l; + + switch (bat) { + case IBAT0: + l = mfspr (IBAT0L); + u = mfspr (IBAT0U); + break; + + case IBAT1: + l = mfspr (IBAT1L); + u = mfspr (IBAT1U); + break; + + case IBAT2: + l = mfspr (IBAT2L); + u = mfspr (IBAT2U); + break; + + case IBAT3: + l = mfspr (IBAT3L); + u = mfspr (IBAT3U); + break; + + case DBAT0: + l = mfspr (DBAT0L); + u = mfspr (DBAT0U); + break; + + case DBAT1: + l = mfspr (DBAT1L); + u = mfspr (DBAT1U); + break; + + case DBAT2: + l = mfspr (DBAT2L); + u = mfspr (DBAT2U); + break; + + case DBAT3: + l = mfspr (DBAT3L); + u = mfspr (DBAT3U); + break; + + default: + return (-1); + } + + *upper = u; + *lower = l; + + return (0); +} |