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* arch/tile: avoid generating .eh_frame information in modulesChris Metcalf2012-10-231-0/+4
| | | | | | | | | | | | | The tile tool chain uses the .eh_frame information for backtracing. The vmlinux build drops any .eh_frame sections at link time, but when present in kernel modules, it causes a module load failure due to the presence of unsupported pc-relative relocations. When compiling to use compiler feedback support, the compiler by default omits .eh_frame information, so we don't see this problem. But when not using feedback, we need to explicitly suppress the .eh_frame. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Cc: stable@vger.kernel.org
* arch/tile: introduce GXIO IORPC framework for tilegxChris Metcalf2012-07-111-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The GXIO I/O RPC subsystem handles exporting I/O hardware resources to Linux and to applications running under Linux. For instance, memory which is made available for I/O DMA must be mapped by an I/O TLB; that means that such memory must be locked down by Linux, so that it is not swapped or otherwise reused, as long as those I/O TLB entries are active. Similarly, configuring direct hardware access introduces new validation requirements. If a user application registers memory, Linux must ensure that the supplied virtual addresses are valid, and turn them into client physical addresses. Similarly, when Linux then supplies those client physical addresses to the Tilera hypervisor, it must in turn validate those before turning them into the real physical addresses which are required by the hardware. To the extent that these sorts of activities were required on previous TILE architecture processors, they were implemented in a device-specific fashion. This meant that every I/O device had its own Tilera hypervisor driver, its own Linux driver, and in some cases its own user-level library support. There was a large amount of more-or-less functionally identical code in different places, particularly in the different Linux drivers. For TILE-Gx, this support has been generalized into a common framework, known as the I/O RPC framework or just IORPC. The two "gxio" directories (one for headers, one for sources) start with just a few files in each with this infrastructure commit, but after adding support for the on-board I/O shims for networking, PCI, USB, crypto, compression, I2CS, etc., there end up being about 20 files in each directory. More information on the IORPC framework is in the <hv/iorpc.h> header, included in this commit. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* tile: default to tilegx_defconfig for ARCH=tileChris Metcalf2012-05-251-1/+6
| | | | | | | | | There is no "ARCH=tile" (just like there is no "ARCH=x86") so we need to pick a default configuration, either tilepro or tilegx, when users specify ARCH=tile. We'll use tilegx, since that's our current chip. Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* arch/tile: stop mentioning the "kvm" subdirectoryChris Metcalf2012-04-021-2/+0
| | | | | | | It causes "make clean" to fail, for example. Once we have KVM support complete, we'll reinstate the subdir reference. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* arch/tile/Makefile: use KCFLAGS when figuring out the libgcc path.Chris Metcalf2012-04-021-1/+2
| | | | Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* arch/tile: parameterize system PLs to support KVM portChris Metcalf2010-10-151-0/+2
| | | | | | | | | While not a port to KVM (yet), this change modifies the kernel to be able to build either at PL1 or at PL2 with a suitable config switch. Pushing up this change avoids handling branch merge issues going forward with the KVM work. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* arch/tile: various top-level Makefile cleanupsChris Metcalf2010-10-141-2/+15
| | | | | | | | Avoid a compile failure if CONFIG_DEBUG_EXTRA_FLAGS is empty (""); provide an "install" hook as well as a matching archhelp target; and some minor whitespace cleanup. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
* arch/tile: don't validate CROSS_COMPILE needlesslyChris Metcalf2010-08-151-9/+11
| | | | | | | | | | With this change, the arch/tile Makefile will only check for a valid combination of CROSS_COMPILE vs "uname -m" for a few common targets that are typically the ones we get wrong (vmlinux, all, and modules). The change handles the case of an empty "make" goal like "make all". Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
* arch/tile: core support for Tilera 32-bit chips.Chris Metcalf2010-06-041-0/+52
This change is the core kernel support for TILEPro and TILE64 chips. No driver support (except the console driver) is included yet. This includes the relevant Linux headers in asm/; the low-level low-level "Tile architecture" headers in arch/, which are shared with the hypervisor, etc., and are build-system agnostic; and the relevant hypervisor headers in hv/. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: Paul Mundt <lethal@linux-sh.org>
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