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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2011 Freescale Semiconductor, Inc.
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*/
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#include <common.h>
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#include <log.h>
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#include <asm/fsl_law.h>
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#include <asm/mmu.h>
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#include <linux/log2.h>
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int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
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{
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immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
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law83xx_t *ecm = &immap->sysconf.ddrlaw[0];
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u64 start_align, law_sz;
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int law_sz_enc;
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if (start == 0)
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start_align = 1ull << (LAW_SIZE_2G + 1);
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else
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start_align = 1ull << (__ffs64(start));
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law_sz = min(start_align, sz);
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law_sz_enc = __ilog2_u64(law_sz) - 1;
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/*
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* Set up LAWBAR for all of DDR.
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*/
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ecm->bar = start & 0xfffff000;
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ecm->ar = (LAWAR_EN | (id << 20) | (LAWAR_SIZE & law_sz_enc));
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debug("DDR:bar=0x%08x\n", ecm->bar);
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debug("DDR:ar=0x%08x\n", ecm->ar);
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/* recalculate size based on what was actually covered by the law */
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law_sz = 1ull << __ilog2_u64(law_sz);
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/* do we still have anything to map */
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sz = sz - law_sz;
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if (sz) {
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start += law_sz;
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start_align = 1ull << (__ffs64(start));
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law_sz = min(start_align, sz);
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law_sz_enc = __ilog2_u64(law_sz) - 1;
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ecm = &immap->sysconf.ddrlaw[1];
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ecm->bar = start & 0xfffff000;
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ecm->ar = (LAWAR_EN | (id << 20) | (LAWAR_SIZE & law_sz_enc));
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debug("DDR:bar=0x%08x\n", ecm->bar);
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debug("DDR:ar=0x%08x\n", ecm->ar);
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} else {
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return 0;
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}
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/* do we still have anything to map */
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sz = sz - law_sz;
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if (sz)
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return 1;
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return 0;
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}
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