OMAP3 zoom1 Add usbtty configuration

[u-boot] / doc / README.mpc8641hpcn

diff --git a/doc/README.mpc8641hpcn b/doc/README.mpc8641hpcn
index 0a6e715bc28db36741dcf38e2834d14f79babab5..d8fe0a4a136b2bd5b053a86e98be38c4efc8c9af 100644 (file)
--- a/doc/README.mpc8641hpcn
+++ b/doc/README.mpc8641hpcn
@@ -113,6 +113,9 @@ To Flash U-boot into the alternative bank (0xEF800000 - 0xEFBFFFFF):
 -------------
 NOTE:  RIO and PCI are mutually exclusive, so they share an address
 
+For 32-bit u-boot, devices are mapped so that the virtual address ==
+the physical address, and the map looks liks this:
+
        Memory Range                    Device          Size
        ------------                    ------          ----
        0x0000_0000     0x7fff_ffff     DDR             2G
@@ -127,6 +130,27 @@ NOTE:  RIO and PCI are mutually exclusive, so they share an address
        0xffc1_0000     0xffc1_ffff     PCI2/PEX2 IO    64K
        0xef80_0000     0xefff_ffff     Flash           8M
 
+For 36-bit-enabled u-boot, the virtual map is the same as for 32-bit.
+However, the physical map is altered to reside in 36-bit space, as follows.
+Addresses are no longer mapped with VA == PA.  All accesses from
+software use the VA; the PA is only used for setting up windows
+and mappings. Note that with the exception of PCI MEM and RIO, the low
+ 32 bits are the same as the VA above; only the top 4 bits vary:
+
+       Memory Range                    Device          Size
+       ------------                    ------          ----
+       0x0_0000_0000   0x0_7fff_ffff   DDR             2G
+       0xc_0000_0000   0xc_1fff_ffff   RIO MEM         512M
+       0xc_0000_0000   0xc_1fff_ffff   PCI1/PEX1 MEM   512M
+       0xc_2000_0000   0xc_3fff_ffff   PCI2/PEX2 MEM   512M
+       0xf_ffe0_0000   0xf_ffef_ffff   CCSR            1M
+       0xf_ffdf_0000   0xf_ffdf_7fff   PIXIS           8K
+       0xf_ffdf_8000   0xf_ffdf_ffff   CF              8K
+       0x0_f840_0000   0xf_f840_3fff   Stack space     32K
+       0xf_ffc0_0000   0xf_ffc0_ffff   PCI1/PEX1 IO    64K
+       0xf_ffc1_0000   0xf_ffc1_ffff   PCI2/PEX2 IO    64K
+       0xf_ef80_0000   0xf_efff_ffff   Flash           8M
+
 5. pixis_reset command
 --------------------
 A new command, "pixis_reset", is introduced to reset mpc8641hpcn board