root / hw / omap_sdrc.c @ 0bf43016
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/*
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* TI OMAP SDRAM controller emulation.
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*
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* Copyright (C) 2007-2008 Nokia Corporation
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* Written by Andrzej Zaborowski <andrew@openedhand.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) any later version of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw.h" |
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#include "omap.h" |
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/* SDRAM Controller Subsystem */
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struct omap_sdrc_s {
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uint8_t config; |
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}; |
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void omap_sdrc_reset(struct omap_sdrc_s *s) |
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{
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s->config = 0x10;
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} |
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static uint32_t omap_sdrc_read(void *opaque, target_phys_addr_t addr) |
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{
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struct omap_sdrc_s *s = (struct omap_sdrc_s *) opaque; |
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switch (addr) {
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case 0x00: /* SDRC_REVISION */ |
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return 0x20; |
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case 0x10: /* SDRC_SYSCONFIG */ |
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return s->config;
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case 0x14: /* SDRC_SYSSTATUS */ |
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return 1; /* RESETDONE */ |
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case 0x40: /* SDRC_CS_CFG */ |
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case 0x44: /* SDRC_SHARING */ |
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case 0x48: /* SDRC_ERR_ADDR */ |
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case 0x4c: /* SDRC_ERR_TYPE */ |
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case 0x60: /* SDRC_DLLA_SCTRL */ |
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case 0x64: /* SDRC_DLLA_STATUS */ |
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case 0x68: /* SDRC_DLLB_CTRL */ |
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case 0x6c: /* SDRC_DLLB_STATUS */ |
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case 0x70: /* SDRC_POWER */ |
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case 0x80: /* SDRC_MCFG_0 */ |
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case 0x84: /* SDRC_MR_0 */ |
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case 0x88: /* SDRC_EMR1_0 */ |
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case 0x8c: /* SDRC_EMR2_0 */ |
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case 0x90: /* SDRC_EMR3_0 */ |
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case 0x94: /* SDRC_DCDL1_CTRL */ |
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case 0x98: /* SDRC_DCDL2_CTRL */ |
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case 0x9c: /* SDRC_ACTIM_CTRLA_0 */ |
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case 0xa0: /* SDRC_ACTIM_CTRLB_0 */ |
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case 0xa4: /* SDRC_RFR_CTRL_0 */ |
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case 0xa8: /* SDRC_MANUAL_0 */ |
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case 0xb0: /* SDRC_MCFG_1 */ |
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case 0xb4: /* SDRC_MR_1 */ |
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case 0xb8: /* SDRC_EMR1_1 */ |
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case 0xbc: /* SDRC_EMR2_1 */ |
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case 0xc0: /* SDRC_EMR3_1 */ |
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case 0xc4: /* SDRC_ACTIM_CTRLA_1 */ |
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case 0xc8: /* SDRC_ACTIM_CTRLB_1 */ |
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case 0xd4: /* SDRC_RFR_CTRL_1 */ |
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case 0xd8: /* SDRC_MANUAL_1 */ |
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return 0x00; |
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} |
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OMAP_BAD_REG(addr); |
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return 0; |
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} |
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static void omap_sdrc_write(void *opaque, target_phys_addr_t addr, |
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uint32_t value) |
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{
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struct omap_sdrc_s *s = (struct omap_sdrc_s *) opaque; |
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switch (addr) {
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case 0x00: /* SDRC_REVISION */ |
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case 0x14: /* SDRC_SYSSTATUS */ |
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case 0x48: /* SDRC_ERR_ADDR */ |
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case 0x64: /* SDRC_DLLA_STATUS */ |
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case 0x6c: /* SDRC_DLLB_STATUS */ |
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OMAP_RO_REG(addr); |
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return;
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case 0x10: /* SDRC_SYSCONFIG */ |
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if ((value >> 3) != 0x2) |
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fprintf(stderr, "%s: bad SDRAM idle mode %i\n",
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__FUNCTION__, value >> 3);
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if (value & 2) |
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omap_sdrc_reset(s); |
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s->config = value & 0x18;
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break;
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case 0x40: /* SDRC_CS_CFG */ |
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case 0x44: /* SDRC_SHARING */ |
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case 0x4c: /* SDRC_ERR_TYPE */ |
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case 0x60: /* SDRC_DLLA_SCTRL */ |
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case 0x68: /* SDRC_DLLB_CTRL */ |
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case 0x70: /* SDRC_POWER */ |
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case 0x80: /* SDRC_MCFG_0 */ |
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case 0x84: /* SDRC_MR_0 */ |
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case 0x88: /* SDRC_EMR1_0 */ |
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case 0x8c: /* SDRC_EMR2_0 */ |
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case 0x90: /* SDRC_EMR3_0 */ |
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case 0x94: /* SDRC_DCDL1_CTRL */ |
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case 0x98: /* SDRC_DCDL2_CTRL */ |
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case 0x9c: /* SDRC_ACTIM_CTRLA_0 */ |
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case 0xa0: /* SDRC_ACTIM_CTRLB_0 */ |
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case 0xa4: /* SDRC_RFR_CTRL_0 */ |
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case 0xa8: /* SDRC_MANUAL_0 */ |
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case 0xb0: /* SDRC_MCFG_1 */ |
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case 0xb4: /* SDRC_MR_1 */ |
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case 0xb8: /* SDRC_EMR1_1 */ |
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case 0xbc: /* SDRC_EMR2_1 */ |
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case 0xc0: /* SDRC_EMR3_1 */ |
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case 0xc4: /* SDRC_ACTIM_CTRLA_1 */ |
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case 0xc8: /* SDRC_ACTIM_CTRLB_1 */ |
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case 0xd4: /* SDRC_RFR_CTRL_1 */ |
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case 0xd8: /* SDRC_MANUAL_1 */ |
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break;
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default:
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OMAP_BAD_REG(addr); |
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return;
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} |
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} |
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static CPUReadMemoryFunc * const omap_sdrc_readfn[] = { |
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omap_badwidth_read32, |
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omap_badwidth_read32, |
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omap_sdrc_read, |
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}; |
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static CPUWriteMemoryFunc * const omap_sdrc_writefn[] = { |
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omap_badwidth_write32, |
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omap_badwidth_write32, |
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omap_sdrc_write, |
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}; |
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struct omap_sdrc_s *omap_sdrc_init(target_phys_addr_t base)
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{
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int iomemtype;
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struct omap_sdrc_s *s = (struct omap_sdrc_s *) |
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qemu_mallocz(sizeof(struct omap_sdrc_s)); |
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omap_sdrc_reset(s); |
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iomemtype = cpu_register_io_memory(omap_sdrc_readfn, |
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omap_sdrc_writefn, s); |
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cpu_register_physical_memory(base, 0x1000, iomemtype);
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return s;
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} |