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| author | Sam Ravnborg <sam@ravnborg.org> | 2012-05-25 21:20:07 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-27 23:52:41 -0700 |
| commit | 30005efc9818d715cc72f15e962d06457c529783 (patch) | |
| tree | aae40ce4536a05fc17ac40f560b139a74a752168 | |
| parent | 7b372d6582ca3bf41a1af9f168f3a852f3d7b21d (diff) | |
| download | linux-stable-30005efc9818d715cc72f15e962d06457c529783.tar.gz linux-stable-30005efc9818d715cc72f15e962d06457c529783.tar.bz2 linux-stable-30005efc9818d715cc72f15e962d06457c529783.zip | |
sparc32: implement proper LEON support in head_32 (after highmem)
We use the compatibility property to determine the
sun models. For leon we use psr.impl and ignore the
result of the getprops call.
Include a hack to allow build as the support code
is not yet converted.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Cc: Konrad Eisele <konrad@gaisler.com>
| -rw-r--r-- | arch/sparc/kernel/head_32.S | 58 |
1 files changed, 33 insertions, 25 deletions
diff --git a/arch/sparc/kernel/head_32.S b/arch/sparc/kernel/head_32.S index 5a418d32d94c..f22a729dfb3d 100644 --- a/arch/sparc/kernel/head_32.S +++ b/arch/sparc/kernel/head_32.S @@ -372,37 +372,27 @@ execute_in_high_mem: sethi %hi(linux_dbvec), %g1 st %o1, [%g1 + %lo(linux_dbvec)] -/* Get the machine type via the mysterious romvec node operations. */ - - add %g7, 0x1c, %l1 - ld [%l1], %l0 - ld [%l0], %l0 - call %l0 - or %g0, %g0, %o0 ! next_node(0) = first_node - or %o0, %g0, %g6 - - sethi %hi(cputypvar), %o1 ! First node has cpu-arch - or %o1, %lo(cputypvar), %o1 - sethi %hi(cputypval), %o2 ! information, the string - or %o2, %lo(cputypval), %o2 - ld [%l1], %l0 ! 'compatible' tells - ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where - call %l0 ! x is one of 'm', 'd' or 'e'. - nop ! %o2 holds pointer - ! to a buf where above string - ! will get stored by the prom. + /* Check if this is a LEON CPU. + * Skip getprops call if it is + */ + srl %g3, PSR_IMPL_SHIFT, %g3 + and %g3, PSR_IMPL_SHIFTED_MASK, %g3 + cmp %g3, PSR_IMPL_LEON + bne get_cputype -#ifdef CONFIG_SPARC_LEON - /* no cpu-type check is needed, it is a SPARC-LEON */ + /* LEON CPU - set boot_cpu_id */ sethi %hi(boot_cpu_id), %g2 ! boot-cpu index #ifdef CONFIG_SMP ldub [%g2 + %lo(boot_cpu_id)], %g1 cmp %g1, 0xff ! unset means first CPU +#ifdef CONFIG_SPARC_LEON + /* XXX Hack to allow build - remove ifdef later */ bne leon_smp_cpu_startup ! continue only with master nop #endif +#endif /* Get CPU-ID from most significant 4-bit of ASR17 */ rd %asr17, %g1 srl %g1, 28, %g1 @@ -412,12 +402,30 @@ execute_in_high_mem: ba continue_boot nop -#endif + +/* Get the machine type via the mysterious romvec node operations. */ +get_cputype: + add %g7, 0x1c, %l1 + ld [%l1], %l0 + ld [%l0], %l0 + call %l0 + or %g0, %g0, %o0 ! next_node(0) = first_node + or %o0, %g0, %g6 + + sethi %hi(cputypvar), %o1 ! First node has cpu-arch + or %o1, %lo(cputypvar), %o1 + sethi %hi(cputypval), %o2 ! information, the string + or %o2, %lo(cputypval), %o2 + ld [%l1], %l0 ! 'compatible' tells + ld [%l0 + 0xc], %l0 ! that we want 'sun4x' where + call %l0 ! x is one of 'm', 'd' or 'e'. + nop ! %o2 holds pointer + ! to a buf where above string + ! will get stored by the prom. /* Check to cputype. We may be booted on a sun4u (64 bit box), * and sun4d needs special treatment. */ - set cputypval, %o2 ldub [%o2 + 0x4], %l1 @@ -467,9 +475,9 @@ sun4m_init: /* This sucks, apparently this makes Vikings call prom panic, will fix later */ 2: rd %psr, %o1 - srl %o1, 28, %o1 ! Get a type of the CPU + srl %o1, PSR_IMPL_SHIFT, %o1 ! Get a type of the CPU - subcc %o1, 4, %g0 ! TI: Viking or MicroSPARC + subcc %o1, PSR_IMPL_TI, %g0 ! TI: Viking or MicroSPARC be continue_boot nop |