Author: zbb Date: Thu May 25 14:25:05 2017 New Revision: 318878 URL: https://svnweb.freebsd.org/changeset/base/318878
Log: Add workaround for CESA MBUS windows with 4GB DRAM 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 (it has to be power-of-2). Submitted by: Marcin Wojtas <m...@semihalf.com> Obtained from: Semihalf Sponsored by: Stormshield Differential revision: https://reviews.freebsd.org/D10724 Modified: head/sys/arm/mv/mv_common.c Modified: head/sys/arm/mv/mv_common.c ============================================================================== --- head/sys/arm/mv/mv_common.c Thu May 25 14:23:49 2017 (r318877) +++ head/sys/arm/mv/mv_common.c Thu May 25 14:25:05 2017 (r318878) @@ -1116,6 +1116,7 @@ static void decode_win_cesa_setup(u_long base) { uint32_t br, cr; + uint64_t size; int i, j; for (i = 0; i < MV_WIN_CESA_MAX; i++) { @@ -1128,7 +1129,21 @@ decode_win_cesa_setup(u_long base) if (ddr_is_active(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_target(i) << IO_WIN_TGT_SHIFT) | IO_WIN_ENA_MASK); _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
