diff options
| author | mario.six@gdsys.cc <mario.six@gdsys.cc> | 2016-04-05 15:05:37 +0200 |
|---|---|---|
| committer | York Sun <york.sun@nxp.com> | 2016-04-08 15:42:10 -0700 |
| commit | 50689461205e0125759eb1a43787383a3fa09b48 (patch) | |
| tree | 00deec51ae3651b7c7544c20cdef3610226661cd | |
| parent | b39d1213e30717c435c8ed43411d573d435557cb (diff) | |
powerpc: mpc85xx: Enable pre-relocation malloc for MPC85xx
To enable DM on MPC85xx, we need pre-relocation malloc, which is
implemented in this patch.
We also make sure that the IVORs are always 4-aligned on e500 to prevent
alignment exceptions caused by code changes in start.S.
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Cc: York Sun <york.sun@nxp.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: York Sun <york.sun@nxp.com>
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu_init_early.c | 9 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/start.S | 30 | ||||
| -rw-r--r-- | include/ppc_asm.tmpl | 3 |
3 files changed, 35 insertions, 7 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init_early.c b/arch/powerpc/cpu/mpc85xx/cpu_init_early.c index 235a635c22..aa519b03fe 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init_early.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init_early.c @@ -82,7 +82,6 @@ void setup_ifc(void) void cpu_init_early_f(void *fdt) { u32 mas0, mas1, mas2, mas3, mas7; - int i; #ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549 ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); #endif @@ -90,17 +89,13 @@ void cpu_init_early_f(void *fdt) ccsr_l2cache_t *l2cache = (void *)CONFIG_SYS_MPC85xx_L2_ADDR; u32 *dst, *src; void (*setup_ifc_sram)(void); + int i; #endif /* Pointer is writable since we allocated a register for it */ gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET); - /* - * Clear initial global data - * we don't use memset so we can share this code with NAND_SPL - */ - for (i = 0; i < sizeof(gd_t); i++) - ((char *)gd)[i] = 0; + /* gd area was zeroed during startup */ #ifdef CONFIG_QEMU_E500 /* diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S index d867e2a767..82a151a0d0 100644 --- a/arch/powerpc/cpu/mpc85xx/start.S +++ b/arch/powerpc/cpu/mpc85xx/start.S @@ -1152,6 +1152,36 @@ _start_cont: /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/ lis r3,(CONFIG_SYS_INIT_RAM_ADDR)@h ori r3,r3,((CONFIG_SYS_INIT_SP_OFFSET-16)&~0xf)@l /* Align to 16 */ + +#ifdef CONFIG_SYS_MALLOC_F_LEN + +#if CONFIG_SYS_MALLOC_F_LEN + GENERATED_GBL_DATA_SIZE > CONFIG_SYS_INIT_RAM_SIZE +#error "CONFIG_SYS_MALLOC_F_LEN too large to fit into initial RAM." +#endif + + /* Leave 16+ byte for back chain termination and NULL return address */ + subi r3,r3,((CONFIG_SYS_MALLOC_F_LEN+16+15)&~0xf) +#endif + + /* End of RAM */ + lis r4,(CONFIG_SYS_INIT_RAM_ADDR)@h + ori r4,r4,(CONFIG_SYS_INIT_RAM_SIZE)@l + + li r0,0 + +1: subi r4,r4,4 + stw r0,0(r4) + cmplw r4,r3 + bne 1b + +#ifdef CONFIG_SYS_MALLOC_F_LEN + lis r4,(CONFIG_SYS_INIT_RAM_ADDR)@h + ori r4,r4,(CONFIG_SYS_GBL_DATA_OFFSET)@l + + addi r3,r3,16 /* Pre-relocation malloc area */ + stw r3,GD_MALLOC_BASE(r4) + subi r3,r3,16 +#endif li r0,0 stw r0,0(r3) /* Terminate Back Chain */ stw r0,+4(r3) /* NULL return address. */ diff --git a/include/ppc_asm.tmpl b/include/ppc_asm.tmpl index ba166ebdd4..379c493919 100644 --- a/include/ppc_asm.tmpl +++ b/include/ppc_asm.tmpl @@ -263,12 +263,14 @@ b transfer_to_handler #define STD_EXCEPTION(n, label, hdlr) \ +.align 4; \ label: \ EXCEPTION_PROLOG(SRR0, SRR1); \ addi r3,r1,STACK_FRAME_OVERHEAD; \ EXC_XFER_TEMPLATE(n, label, hdlr, MSR_KERNEL, NOCOPY) \ #define CRIT_EXCEPTION(n, label, hdlr) \ +.align 4; \ label: \ EXCEPTION_PROLOG(CSRR0, CSRR1); \ addi r3,r1,STACK_FRAME_OVERHEAD; \ @@ -276,6 +278,7 @@ label: \ MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \ #define MCK_EXCEPTION(n, label, hdlr) \ +.align 4; \ label: \ EXCEPTION_PROLOG(MCSRR0, MCSRR1); \ addi r3,r1,STACK_FRAME_OVERHEAD; \ |