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head/sys/arm/mv/mv_common.c
| Show First 20 Lines • Show All 1,110 Lines • ▼ Show 20 Lines | |||||
| /* | /* | ||||
| * Set CESA decode windows. | * Set CESA decode windows. | ||||
| */ | */ | ||||
| static void | static void | ||||
| decode_win_cesa_setup(u_long base) | decode_win_cesa_setup(u_long base) | ||||
| { | { | ||||
| uint32_t br, cr; | uint32_t br, cr; | ||||
| uint64_t size; | |||||
| int i, j; | int i, j; | ||||
| for (i = 0; i < MV_WIN_CESA_MAX; i++) { | for (i = 0; i < MV_WIN_CESA_MAX; i++) { | ||||
| win_cesa_cr_write(base, i, 0); | win_cesa_cr_write(base, i, 0); | ||||
| win_cesa_br_write(base, i, 0); | win_cesa_br_write(base, i, 0); | ||||
| } | } | ||||
| /* Only access to active DRAM banks is required */ | /* Only access to active DRAM banks is required */ | ||||
| for (i = 0; i < MV_WIN_DDR_MAX; i++) { | for (i = 0; i < MV_WIN_DDR_MAX; i++) { | ||||
| if (ddr_is_active(i)) { | if (ddr_is_active(i)) { | ||||
| br = ddr_base(i); | br = ddr_base(i); | ||||
| cr = (((ddr_size(i) - 1) & 0xffff0000) | | size = ddr_size(i); | ||||
| #ifdef SOC_MV_ARMADA38X | |||||
| /* | |||||
| * Armada 38x SoC's equipped with 4GB DRAM | |||||
| * suffer freeze during CESA operation, if | |||||
| * MBUS window opened at given DRAM CS reaches | |||||
| * end of the address space. Apply a workaround | |||||
| * by setting the window size to the closest possible | |||||
| * value, i.e. divide it by 2. | |||||
| */ | |||||
| if (size + ddr_base(i) == 0x100000000ULL) | |||||
| size /= 2; | |||||
| #endif | |||||
| cr = (((size - 1) & 0xffff0000) | | |||||
| (ddr_attr(i) << IO_WIN_ATTR_SHIFT) | | (ddr_attr(i) << IO_WIN_ATTR_SHIFT) | | ||||
| (ddr_target(i) << IO_WIN_TGT_SHIFT) | | (ddr_target(i) << IO_WIN_TGT_SHIFT) | | ||||
| IO_WIN_ENA_MASK); | IO_WIN_ENA_MASK); | ||||
| /* Set the first free CESA window */ | /* Set the first free CESA window */ | ||||
| for (j = 0; j < MV_WIN_CESA_MAX; j++) { | for (j = 0; j < MV_WIN_CESA_MAX; j++) { | ||||
| if (win_cesa_cr_read(base, j) & 0x1) | if (win_cesa_cr_read(base, j) & 0x1) | ||||
| continue; | continue; | ||||
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