From 3f2546b2ef55b661fd8dd69682b38992225e86f6 Mon Sep 17 00:00:00 2001 From: fishsoupisgood Date: Mon, 29 Apr 2019 01:17:54 +0100 Subject: Initial import of qemu-2.4.1 --- roms/u-boot/arch/powerpc/cpu/mpc83xx/law.c | 61 ++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 roms/u-boot/arch/powerpc/cpu/mpc83xx/law.c (limited to 'roms/u-boot/arch/powerpc/cpu/mpc83xx/law.c') diff --git a/roms/u-boot/arch/powerpc/cpu/mpc83xx/law.c b/roms/u-boot/arch/powerpc/cpu/mpc83xx/law.c new file mode 100644 index 00000000..66c88b69 --- /dev/null +++ b/roms/u-boot/arch/powerpc/cpu/mpc83xx/law.c @@ -0,0 +1,61 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * Version 2 as published by the Free Software Foundation. + */ + +#include +#include +#include + +int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id) +{ + immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; + law83xx_t *ecm = &immap->sysconf.ddrlaw[0]; + u64 start_align, law_sz; + int law_sz_enc; + + if (start == 0) + start_align = 1ull << (LAW_SIZE_2G + 1); + else + start_align = 1ull << (ffs64(start) - 1); + law_sz = min(start_align, sz); + law_sz_enc = __ilog2_u64(law_sz) - 1; + + /* + * Set up LAWBAR for all of DDR. + */ + ecm->bar = start & 0xfffff000; + ecm->ar = (LAWAR_EN | (id << 20) | (LAWAR_SIZE & law_sz_enc)); + debug("DDR:bar=0x%08x\n", ecm->bar); + debug("DDR:ar=0x%08x\n", ecm->ar); + + /* recalculate size based on what was actually covered by the law */ + law_sz = 1ull << __ilog2_u64(law_sz); + + /* do we still have anything to map */ + sz = sz - law_sz; + if (sz) { + start += law_sz; + + start_align = 1ull << (ffs64(start) - 1); + law_sz = min(start_align, sz); + law_sz_enc = __ilog2_u64(law_sz) - 1; + ecm = &immap->sysconf.ddrlaw[1]; + ecm->bar = start & 0xfffff000; + ecm->ar = (LAWAR_EN | (id << 20) | (LAWAR_SIZE & law_sz_enc)); + debug("DDR:bar=0x%08x\n", ecm->bar); + debug("DDR:ar=0x%08x\n", ecm->ar); + } else { + return 0; + } + + /* do we still have anything to map */ + sz = sz - law_sz; + if (sz) + return 1; + + return 0; +} -- cgit v1.2.3