| /* Copyright (c) 2009, The Linux Foundation. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of The Linux Foundation nor |
| * the names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior written |
| * permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <reg.h> |
| |
| #define EBI1_SIZE1 0x0E800000 //232MB for 256/512/1024MB RAM |
| #define EBI1_ADDR1 0x20000000 |
| |
| #define EBI1_SIZE2_512M 0x10000000 //256MB for 512MB RAM |
| #define EBI1_SIZE2_1G 0x30000000 //768MB for 1GB RAM |
| #define EBI1_ADDR2 0x30000000 |
| |
| static unsigned check_1gb_mem() |
| { |
| // check for 1GB |
| unsigned adr1 = 0x57000000; |
| unsigned adr2 = 0x5F000000; |
| unsigned value1 = 0x55555555; |
| unsigned value2 = 0xAAAAAAAA; |
| |
| writel(value1, adr1); |
| writel(value2, adr2); |
| |
| return ((value1 == readl(adr1)) && (value2 == readl(adr2))); |
| } |
| |
| |
| unsigned* target_atag_mem(unsigned* ptr) |
| { |
| unsigned size; |
| |
| /* ATAG_MEM */ |
| /* 1st segment */ |
| *ptr++ = 4; |
| *ptr++ = 0x54410002; |
| *ptr++ = EBI1_SIZE1; |
| *ptr++ = EBI1_ADDR1; |
| |
| /* 2nd segment */ |
| #ifdef USE_512M_RAM |
| size = EBI1_SIZE2_512M; |
| #else |
| size = 0; |
| #endif |
| if (check_1gb_mem()) { |
| size = EBI1_SIZE2_1G; |
| } |
| |
| if (size > 0) { |
| *ptr++ = 4; |
| *ptr++ = 0x54410002; |
| *ptr++ = size; |
| *ptr++ = EBI1_ADDR2; |
| } |
| |
| return ptr; |
| } |