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| author |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-22 19:21:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-22 19:21:54 -0700 |
| commit | 8b0eaccab4584ace24d233214bfee3cb50e49a60 (patch) | |
| tree | a22c53631041504f357f06e0ab779b3d3b283423 /arch/powerpc/sysdev | |
| parent | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus (diff) | |
| parent | Merge branch 'for-2.6.24' of git://git.secretlab.ca/git/linux-2.6-mpc52xx (diff) | |
| download | linux-dev-8b0eaccab4584ace24d233214bfee3cb50e49a60.tar.xz linux-dev-8b0eaccab4584ace24d233214bfee3cb50e49a60.zip | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
[POWERPC] Enable restart support for lite5200 board
[POWERPC] Add restart support for mpc52xx based platforms
[POWERPC] Update device tree binding for mpc5200 gpt
[POWERPC] Add mpc52xx_find_and_map_path(), refactor utility functions
[POWERPC] bestcomm: Restrict bus prefetch bugfix to original mpc5200 silicon.
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/bestcomm/bestcomm.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/powerpc/sysdev/bestcomm/bestcomm.c b/arch/powerpc/sysdev/bestcomm/bestcomm.c index 48492a83e5a7..740ad73ce5cc 100644 --- a/arch/powerpc/sysdev/bestcomm/bestcomm.c +++ b/arch/powerpc/sysdev/bestcomm/bestcomm.c @@ -269,6 +269,7 @@ bcom_engine_init(void) int task; phys_addr_t tdt_pa, ctx_pa, var_pa, fdt_pa; unsigned int tdt_size, ctx_size, var_size, fdt_size; + u16 regval; /* Allocate & clear SRAM zones for FDT, TDTs, contexts and vars/incs */ tdt_size = BCOM_MAX_TASKS * sizeof(struct bcom_tdt); @@ -319,9 +320,11 @@ bcom_engine_init(void) /* Init 'always' initiator */ out_8(&bcom_eng->regs->ipr[BCOM_INITIATOR_ALWAYS], BCOM_IPR_ALWAYS); - /* Disable COMM Bus Prefetch, apparently it's not reliable yet */ - /* FIXME: This should be done on 5200 and not 5200B ... */ - out_be16(&bcom_eng->regs->PtdCntrl, in_be16(&bcom_eng->regs->PtdCntrl) | 1); + /* Disable COMM Bus Prefetch on the original 5200; it's broken */ + if ((mfspr(SPRN_SVR) & MPC5200_SVR_MASK) == MPC5200_SVR) { + regval = in_be16(&bcom_eng->regs->PtdCntrl); + out_be16(&bcom_eng->regs->PtdCntrl, regval | 1); + } /* Init lock */ spin_lock_init(&bcom_eng->lock); |