66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/*
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* Copyright 2013 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include "ram.h"
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#include "regsnv04.h"
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const struct nvkm_ram_func
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nv04_ram_func = {
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};
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int
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nv04_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
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{
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struct nvkm_device *device = fb->subdev.device;
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u32 boot0 = nvkm_rd32(device, NV04_PFB_BOOT_0);
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u64 size;
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enum nvkm_ram_type type;
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if (boot0 & 0x00000100) {
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size = ((boot0 >> 12) & 0xf) * 2 + 2;
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size *= 1024 * 1024;
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} else {
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switch (boot0 & NV04_PFB_BOOT_0_RAM_AMOUNT) {
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case NV04_PFB_BOOT_0_RAM_AMOUNT_32MB:
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size = 32 * 1024 * 1024;
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break;
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case NV04_PFB_BOOT_0_RAM_AMOUNT_16MB:
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size = 16 * 1024 * 1024;
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break;
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case NV04_PFB_BOOT_0_RAM_AMOUNT_8MB:
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size = 8 * 1024 * 1024;
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break;
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case NV04_PFB_BOOT_0_RAM_AMOUNT_4MB:
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size = 4 * 1024 * 1024;
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break;
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}
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}
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if ((boot0 & 0x00000038) <= 0x10)
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type = NVKM_RAM_TYPE_SGRAM;
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else
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type = NVKM_RAM_TYPE_SDRAM;
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return nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);
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}
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