projects / OpenSPARC-T2-DV / blame
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1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== | |
| 3 | * | |
| 4 | * OpenSPARC T2 Processor File: peu_set_serdes_pll_ratio.s | |
| 5 | * Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved | |
| 6 | * 4150 Network Circle, Santa Clara, California 95054, U.S.A. | |
| 7 | * | |
| 8 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or modify | |
| 11 | * it under the terms of the GNU General Public License as published by | |
| 12 | * the Free Software Foundation; version 2 of the License. | |
| 13 | * | |
| 14 | * This program is distributed in the hope that it will be useful, | |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 | * GNU General Public License for more details. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU General Public License | |
| 20 | * along with this program; if not, write to the Free Software | |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 22 | * | |
| 23 | * For the avoidance of doubt, and except that if any non-GPL license | |
| 24 | * choice is available it will apply instead, Sun elects to use only | |
| 25 | * the General Public License version 2 (GPLv2) at this time for any | |
| 26 | * software where a choice of GPL license versions is made | |
| 27 | * available with the language indicating that GPLv2 or any later version | |
| 28 | * may be used, or where a choice of which version of the GPL is applied is | |
| 29 | * otherwise unspecified. | |
| 30 | * | |
| 31 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 32 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 33 | * have any questions. | |
| 34 | * | |
| 35 | * | |
| 36 | * ========== Copyright Header End ============================================ | |
| 37 | */ | |
| 38 | #include "ccu_defines.h" | |
| 39 | #include "peu_defines.h" | |
| 40 | ||
| 41 | #define PEU_SERDES_PLL_MPY__100MHZ 7 | |
| 42 | #define PEU_SERDES_PLL_MPY__125MHZ 5 | |
| 43 | #define PEU_SERDES_PLL_MPY__250MHZ 1 | |
| 44 | ||
| 45 | ||
| 46 | #ifdef PCIE_REF_CLK_100 | |
| 47 | peu_set_target_pcie_ref_clk_100MHz: | |
| 48 | mov PEU_SERDES_PLL_MPY__100MHZ, %g4 | |
| 49 | #else | |
| 50 | #ifdef PCIE_REF_CLK_125 | |
| 51 | peu_set_target_pcie_ref_clk_125MHz: | |
| 52 | mov PEU_SERDES_PLL_MPY__125MHZ, %g4 | |
| 53 | #else | |
| 54 | #ifdef PCIE_REF_CLK_250 | |
| 55 | peu_set_target_pcie_ref_clk_250MHz: | |
| 56 | mov PEU_SERDES_PLL_MPY__250MHZ, %g4 | |
| 57 | #endif /* PCIE_REF_CLK_250 */ | |
| 58 | #endif /* PCIE_REF_CLK_125 */ | |
| 59 | #endif /* PCIE_REF_CLK_100 */ | |
| 60 | #if defined(PCIE_REF_CLK_100) || defined(PCIE_REF_CLK_125) || defined(PCIE_REF_CLK_250) | |
| 61 | peu_check_serdes_pll_ratio: | |
| 62 | best_set_reg(FIRE_PLC_TLU_CTB_TLR_CSR_A_SERDES_PLL_ADDR, %g2, %g3) | |
| 63 | ldx [%g3], %g5 | |
| 64 | sub %g5, %g4, %g5 | |
| 65 | brz %g5, peu_serdes_pll_ratio_already_set | |
| 66 | nop | |
| 67 | peu_set_serdes_pll_ratio: | |
| 68 | stx %g4, [%g3] ! set mpy field for 100Mhz refclk | |
| 69 | ! do a warm reset to activate the new value, per PRM 16.6.6 | |
| 70 | setx RESET_GEN, %g2, %g5 ! warm reset reg | |
| 71 | add %g0, 0x1, %g7 ! warm reset reg data | |
| 72 | peu_kick_wmr_for_serdes_pll_ratio_change: | |
| 73 | stx %g7, [%g5] ! Warm Reset | |
| 74 | ldx [%g5], %g7 ! Force a delay to wait for WMR | |
| 75 | ||
| 76 | peu_serdes_pll_ratio_already_set: | |
| 77 | #endif /*defined(PCIE_REF_CLK_100) || defined(PCIE_REF_CLK_125) || defined(PCIE_REF_CLK_250)*/ |