Re: [U-Boot] [PATCH v2] mpc86xx: set the DDR BATs after calculating true DDR size

Kumar Gala wrote:

+void setup_ddr_bat(phys_addr_t dram_size) +{

• unsigned long batu, bl;
• bl = TO_BATU_BL(min(dram_size, CONFIG_MAX_MEM_MAPPED));
• if (BATU_SIZE(bl) != dram_size) {

• u64 sz = (u64)dram_size - BATU_SIZE(bl);
  

• print_size(sz, " left unmapped\n");
  

• }

We still have the problem that, on a 1.5GB system, U-Boot will think that there are 1.5GB of DDR, but the BAT will be set to 1GB. When U-Boot tries to relocate itself, it will machine check.

We need a way to tell U-Boot that we only have 1GB of DDR, but still have it tell Linux that we have 1.5GB of DDR.