NULL is an absolute value and should not be relocated.
After this correction code like:
void weak_fun(void) __attribute__((weak));
printf("weak_fun:%p\n", weak_fun);
will still print null after relocation.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
When U-Boot is relocated from flash to RAM pointers are modified
accordingly. However, pointers initialzed with NULL values should not
be modified so that they maintain their intended NULL value. If the
BSS segment is linked at address 0 its address will not be
updated as necessary during relocation.
This is a temporary workaround. The end goal is to add support to
U-Boot to dynamically locate the BSS at an arbitrary address at
runtime. When the ability to fixup the BSS inteligently is
added, this workaround can be removed and the 85xx link script
can put the BSS at a fixed address at link time.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
The following changes allow U-Boot to fully relocate from flash to
RAM:
- Remove linker scripts' .fixup sections from the .text section
- Add -mrelocatable to PLATFORM_RELFLAGS for all boards
- Define CONFIG_RELOC_FIXUP_WORKS for all boards
Previously, U-Boot would partially relocate, but statically initialized
pointers needed to be manually relocated.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
The means to determine the core, bus, and DDR frequencies are completely
new on CoreNet style platforms. Additionally on p4080 we can have
different frequencies for FMAN and PME IP blocks. We need to keep track
of the FMAN & PME frequencies since they are used for time stamping
capabilities inside each block.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
On CoreNet style platforms the timebase frequency is the bus frequency
defined by 16 (on PQ3 it is divide by 8). Also on the CoreNet platforms
the core not longer controls the enabling of the timebase. We now need
to enable the boot core's timebase via CCSR register writes.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
There are various locations that we have chip specific info:
* Makefile for which ddr code to build
* Added p4080 & p4040 to cpu_type_list and SVR list
* Added number of LAWs for p4080
* Set CONFIG_MAX_CPUS to 8 for p4080
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The CoreNet platform style of bringing secondary cores out of reset is
a bit different that the PQ3 style. Mostly the registers that we use
to setup boot translation, enable time bases, and boot release the cores
have moved around.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
On CoreNet based platforms the CCSRBAR address is split between an high &
low register and we no longer shift the address.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Scott Wood <scottwood@freescale.com>
The code assumed names where just numbers and always prefixed 'mpc'.
However newer QorIQ don't follow the mpc naming scheme.
Signed-off-by: Vivek Mahajan <vivek.mahajan@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
When boot from NAND, the NAND flash must be connected to br/or0.
Also init RAM(L2 SRAM or DDR SDRAM) for load the second image to
it.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The first stage 4K image uses a seperate ld script file to
generate 4K image. This patch moves it to the cpu/mpc85xx/*
to make it avaliable for 85xx platform.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
We should make sure to clear MSR[ME, CE, DE] when we boot an OS image
since we have changed the exception vectors and the OSes vectors might
not be setup we should avoid async interrupts at all costs.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Use write_tlb and don't use memset so we can use the same code for
cpu_init_early_f between NAND SPL and not.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The MPC8536E is capable of booting form NAND/eSDHC/eSPI, this patch
implements these three bootup methods in a unified way - all of these
use the general cpu/mpc85xx/start.S, and load the main image to L2SRAM
which lets us use the SPD to initialize the SDRAM.
For all three bootup methods, the bootup process can be divided into two
stages: the first stage will initialize the corresponding controller,
configure the L2SRAM, then copy the second stage image to L2SRAM and
jump to it. The second stage image is just like the general U-Boot image
to configure all the hardware and boot up to U-Boot command line.
When boot from NAND, the eLBC controller will first load the first stage
image to internal 4K RAM buffer because it's also stored on the NAND
flash. The first stage image, also call 4K NAND loader, will initialize
the L2SRAM, load the second stage image to L2SRAM and jump to it. The 4K
NAND loader's code comes from the corresponding nand_spl directory, along
with the code twisted by CONFIG_NAND_SPL.
When boot from eSDHC/eSPI, there's no such a first stage image because
the CPU ROM code does the same work. It will initialize the L2SRAM
according to the config addr/word pairs on the fixed address and
initialize the eSDHC/eSPI controller, then load the second stage image
to L2SRAM and jump to it.
The macro CONFIG_SYS_RAMBOOT is used to control the code to produce the
second stage image for all different bootup methods. It's set in the
board config file when one of the bootup methods above is selected.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
If we move some of the functions in tlb.c around we need less
ifdefs. The first stage loader just needs invalidate_tlb and
init_tlbs.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
We can pack the initial tlb_table in MAS register format and use
write_tlb to set things up. This savings can be helpful for NAND
style first stage boot loaders.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Factor out the code we use to actually write a tlb entry.
set_tlb is a logical view of the TLB while write_tlb is a low level
matching the MAS registers.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Skipping the interrupted instruction will accomplish nothing other
than turning a spurious interrupt into a crash.
External interrupts are not machine checks, so don't count them as such.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Its reset value is random, and we sometimes read uninitialized TLB
arrays. Make sure that we don't retain MAS8 from reading such an entry
if the VF bit in MAS8 is set, attempts to use the mapping will trap.
Signed-off-by: Scott Wood <scottwood@freescale.com>
We cannot handle any exceptions while running in AS1, as the exceptions
will transition back to AS0 without a valid mapping.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Some board ports place TEXT_BASE at a location that would cause the
RESET_VECTOR_ADDRESS not to be at 0xfffffffc when we link. By default
we assume RESET_VECTOR_ADDRESS will be 0xfffffffc if the board doesn't
explicitly set it.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Wolfgang Denk <wd@denx.de>
There is no reason to do a run time check for e500 v1 based cores to
determine if we have the GUTs RSTCR facility. Only the first generation
of PQ3 parts (MPC8540/41/55/60) do not have it. So checking to see if
we are e500 v2 would miss future parts (like e500mc).
Just change this to be ifdef'd based on CONFIG_MPC85{40,41,55,60}.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
While in probecpu() UART is still not initialized.
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Fixing the number of cores in the device tree based on the actual number of
cores on the system. With this same device tree image can be used for dual
core and single core members of otherwise exactly same SOC.
For example:
* P2020RDB and P2010RDB
* P1020RDB and P1011RDB
* MPC8641D and MPC8641
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Incase the system is detected with Unknown SVR, let the system boot
with a default value and a proper message.
Now with dynamic detection of SOC properties from SVR, this is necessary
to prevent a crash.
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Cleaned up cpu/mpc85xx/Makefile to use CONFIG_* for those obvious cases
we have like PCI, CPM2, QE. Also reworked it to use one line per file
for everything and sorted in alphabetical order.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Its possible that we try and copy the boot page code out of flash into a
DDR location that doesn't have a TLB cover it. For example, if we have
3G of DDR we typically only map the first 2G. In the cases of 4G+ this
wasn't an issue since the reset page TLB mapping covered the last page
of memory which we wanted to copy to.
We now change the physical address of the reset page TLB to map to the
true physical location of the boot page code, copy and than set the
TLB back to its 1:1 mapping of the reset page.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Allow us to search the TLB array based on an address. This is useful
if we want to change an entry but dont know where it happens to be
located.
For example, the boot page mapping we use on MP or the flash TLB that
we change the WIMGE settings for after we've relocated.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
In future Book-E implementations IVORs will most likely go away and be
replaced with fixed offsets. The IVPR will continue to exist to allow
for relocation of the interrupt vectors.
This code adds support to setup the IVORs as their fixed offset values
per the ISA 2.06 spec when we transition from u-boot to another OS
either via 'bootm' or a cpu release.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The ddr_pd_cntl isn't defined in any reference manual and thus we wil
remove especially since we set it to 0, which would most likely be its
POR value.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Enable eSDHC Clock based on generic CONFIG_FSL_ESDHC define instead of a
platform define. This will enable all the 85xx platforms to use sdhc_clk
based on CONFIG_FSL_ESDHC.
Signed-off-by: Gao Guanhua <B22826@freescale.com>
Signed-off-by: Dipen Dudhat <dipen.dudhat@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The MPIC initialization code for Freescale e500 CPUs was not using I/O
accessors, and it was not issuing a read-back to the MPIC after setting
mixed mode. This may be the cause of a spurious interrupt on some systems.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
P1011 - Single core variant of P1020
P2010 - Single core variant of P2020
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
There are really no differences between all the 85xx linker scripts so
we can just move to a single common one. Board code is still able to
override the common one if need be.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
P1020 is another member of QorIQ series of processors which falls in ULE
category. It is an e500 based dual core SOC.
Being a scaled down version of P2020 it has following differences:
- 533MHz - 800MHz core frequency.
- 256Kbyte L2 cache
- Ethernet controllers with classification capabilities.
Also the SOC is pin compatible with P2020
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The number of CPUs are getting detected dynamically by checking the
processor SVR value. Also removed CONFIG_NUM_CPUS references from all
the platforms with 85xx/86xx processors.
This can help to use the same u-boot image across the platforms.
Also revamped and corrected few Freescale Copyright messages.
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Removed same code pieces from cpu/mpc85xx/cpu.c and cpu/mpc86xx/cpu.c
and moved to cpu/mpc8xxx/cpu.c(new file)
Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
For historic reasons we had defined some additional PLATFORM_CPPFLAGS
like:
PLATFORM_CPPFLAGS += -DCONFIG_E500=1
PLATFORM_CPPFLAGS += -DCONFIG_MPC85xx=1
PLATFORM_CPPFLAGS += -DCONFIG_MPC8548=1
However these are all captured in the config.h and thus redudant.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
When we init the addrmap based on the TLB we will not end up getting
the TLB that covers memory if we are using SPD. The reason is we
haven't relocated at the point that we setup the memory TLB and thus it
will not get setup in the addrmap.
Instead we can just walk over the TLB array after we've relocated and
see all the TLBs that have been set and use that information to populate
the initial addrmap. By doing this we insure that we get the TLB
entries that cover memory.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Also update dmacpy()'s argument order to match memcpy's and use
phys_addr_t/phy_size_t for address/size arguments
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
DMA support is now enabled via the CONFIG_FSL_DMA define instead of the
previous CONFIG_DDR_ECC
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
