src/soc/mediatek/common/l2c_ops.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/mmio.h>
   4 #include <soc/mcucfg.h>
   5 #include <soc/mmu_operations.h>
   6
   7 DEFINE_BIT(MP0_CLUSTER_CFG0_L3_SHARE_EN, 9)
   8 DEFINE_BIT(MP0_CLUSTER_CFG0_L3_SHARE_PRE_EN, 8)
   9
  10 void mtk_soc_disable_l2c_sram(void)
  11 {
  12         unsigned long v;
  13
  14         SET32_BITFIELDS(&mtk_mcucfg->mp0_cluster_cfg0,
  15                         MP0_CLUSTER_CFG0_L3_SHARE_EN, 0);
  16         dsb();
  17
  18         __asm__ volatile ("mrs %0, S3_0_C15_C3_5" : "=r" (v));
  19         v |= (0xf << 4);
  20         __asm__ volatile ("msr S3_0_C15_C3_5, %0" : : "r" (v));
  21         dsb();
  22
  23         do {
  24                 __asm__ volatile ("mrs %0, S3_0_C15_C3_7" : "=r" (v));
  25         } while (((v >> 0x4) & 0xf) != 0xf);
  26
  27         SET32_BITFIELDS(&mtk_mcucfg->mp0_cluster_cfg0,
  28                         MP0_CLUSTER_CFG0_L3_SHARE_PRE_EN, 0);
  29         dsb();
  30 }