cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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g2d-hw.c (2129B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Samsung S5P G2D - 2D Graphics Accelerator Driver
      4 *
      5 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
      6 * Kamil Debski, <k.debski@samsung.com>
      7 */
      8
      9#include <linux/io.h>
     10
     11#include "g2d.h"
     12#include "g2d-regs.h"
     13
     14#define w(x, a)	writel((x), d->regs + (a))
     15#define r(a)	readl(d->regs + (a))
     16
     17/* g2d_reset clears all g2d registers */
     18void g2d_reset(struct g2d_dev *d)
     19{
     20	w(1, SOFT_RESET_REG);
     21}
     22
     23void g2d_set_src_size(struct g2d_dev *d, struct g2d_frame *f)
     24{
     25	u32 n;
     26
     27	w(0, SRC_SELECT_REG);
     28	w(f->stride & 0xFFFF, SRC_STRIDE_REG);
     29
     30	n = f->o_height & 0xFFF;
     31	n <<= 16;
     32	n |= f->o_width & 0xFFF;
     33	w(n, SRC_LEFT_TOP_REG);
     34
     35	n = f->bottom & 0xFFF;
     36	n <<= 16;
     37	n |= f->right & 0xFFF;
     38	w(n, SRC_RIGHT_BOTTOM_REG);
     39
     40	w(f->fmt->hw, SRC_COLOR_MODE_REG);
     41}
     42
     43void g2d_set_src_addr(struct g2d_dev *d, dma_addr_t a)
     44{
     45	w(a, SRC_BASE_ADDR_REG);
     46}
     47
     48void g2d_set_dst_size(struct g2d_dev *d, struct g2d_frame *f)
     49{
     50	u32 n;
     51
     52	w(0, DST_SELECT_REG);
     53	w(f->stride & 0xFFFF, DST_STRIDE_REG);
     54
     55	n = f->o_height & 0xFFF;
     56	n <<= 16;
     57	n |= f->o_width & 0xFFF;
     58	w(n, DST_LEFT_TOP_REG);
     59
     60	n = f->bottom & 0xFFF;
     61	n <<= 16;
     62	n |= f->right & 0xFFF;
     63	w(n, DST_RIGHT_BOTTOM_REG);
     64
     65	w(f->fmt->hw, DST_COLOR_MODE_REG);
     66}
     67
     68void g2d_set_dst_addr(struct g2d_dev *d, dma_addr_t a)
     69{
     70	w(a, DST_BASE_ADDR_REG);
     71}
     72
     73void g2d_set_rop4(struct g2d_dev *d, u32 r)
     74{
     75	w(r, ROP4_REG);
     76}
     77
     78void g2d_set_flip(struct g2d_dev *d, u32 r)
     79{
     80	w(r, SRC_MSK_DIRECT_REG);
     81}
     82
     83void g2d_set_v41_stretch(struct g2d_dev *d, struct g2d_frame *src,
     84					struct g2d_frame *dst)
     85{
     86	w(DEFAULT_SCALE_MODE, SRC_SCALE_CTRL_REG);
     87
     88	/* inversed scaling factor: src is numerator */
     89	w((src->c_width << 16) / dst->c_width, SRC_XSCALE_REG);
     90	w((src->c_height << 16) / dst->c_height, SRC_YSCALE_REG);
     91}
     92
     93void g2d_set_cmd(struct g2d_dev *d, u32 c)
     94{
     95	w(c, BITBLT_COMMAND_REG);
     96}
     97
     98void g2d_start(struct g2d_dev *d)
     99{
    100	/* Clear cache */
    101	if (d->variant->hw_rev == TYPE_G2D_3X)
    102		w(0x7, CACHECTL_REG);
    103
    104	/* Enable interrupt */
    105	w(1, INTEN_REG);
    106	/* Start G2D engine */
    107	w(1, BITBLT_START_REG);
    108}
    109
    110void g2d_clear_int(struct g2d_dev *d)
    111{
    112	w(1, INTC_PEND_REG);
    113}