diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/firmware-design.md | 4 | ||||
| -rw-r--r-- | docs/porting-guide.md | 29 | ||||
| -rw-r--r-- | docs/user-guide.md | 3 |
3 files changed, 35 insertions, 1 deletions
diff --git a/docs/firmware-design.md b/docs/firmware-design.md index fe3c3f03..87bdb884 100644 --- a/docs/firmware-design.md +++ b/docs/firmware-design.md @@ -176,7 +176,9 @@ BL1 performs minimal architectural initialization as follows. - `SCR_EL3`. The register width of the next lower exception level is set to AArch64 by setting the `SCR.RW` bit. The `SCR.EA` bit is set to trap - both External Aborts and SError Interrupts in EL3. + both External Aborts and SError Interrupts in EL3. The `SCR.SIF` bit is + also set to disable instruction fetches from Non-secure memory when in + secure state. - `CPTR_EL3`. Accesses to the `CPACR_EL1` register from EL1 or EL2, or the `CPTR_EL2` register from EL2 are configured to not trap to EL3 by diff --git a/docs/porting-guide.md b/docs/porting-guide.md index e62db4de..5e148232 100644 --- a/docs/porting-guide.md +++ b/docs/porting-guide.md @@ -633,6 +633,35 @@ retrieved from the platform. The function also reports extra information related to the ROTPK in the flags parameter. +### Function: plat_get_nv_ctr() + + Argument : void *, unsigned int * + Return : int + +This function is mandatory when Trusted Board Boot is enabled. It returns the +non-volatile counter value stored in the platform in the second argument. The +cookie in the first argument may be used to select the counter in case the +platform provides more than one (for example, on platforms that use the default +TBBR CoT, the cookie will correspond to the OID values defined in +TRUSTED_FW_NVCOUNTER_OID or NON_TRUSTED_FW_NVCOUNTER_OID). + +The function returns 0 on success. Any other value means the counter value could +not be retrieved from the platform. + + +### Function: plat_set_nv_ctr() + + Argument : void *, unsigned int + Return : int + +This function is mandatory when Trusted Board Boot is enabled. It sets a new +counter value in the platform. The cookie in the first argument may be used to +select the counter (as explained in plat_get_nv_ctr()). + +The function returns 0 on success. Any other value means the counter value could +not be updated. + + 2.3 Common mandatory modifications --------------------------------- diff --git a/docs/user-guide.md b/docs/user-guide.md index 3458f640..e5e28a3f 100644 --- a/docs/user-guide.md +++ b/docs/user-guide.md @@ -42,6 +42,9 @@ The software has been tested on Ubuntu 14.04 LTS (64-bit). Packages used for building the software were installed from that distribution unless otherwise specified. +The software has also been built on Windows 7 Enterprise SP1, using CMD.EXE, +Cygwin, and Msys (MinGW) shells, using version 4.9.1 of the GNU toolchain. + 3. Tools --------- |